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Colour

#01B557

  • #01B557
  • Green
  • Dark
  • Nearest: Medium seagreen

#01B557 is a green with RGB values 1, 181, 87 and HSL 149°, 99%, 36%. It is a dark colour, so black text on it reaches 7.7:1 contrast (AAA for normal text). The nearest named colour is Medium seagreen.

Colour values

#01B557#01B557
HEX#01B557
RGBrgb(1, 181, 87)
RGB (0–1)0.0039, 0.7098, 0.3412
RGB percentages0.4%, 71%, 34.1%
HSLhsl(148.7, 98.9%, 35.7%)
HSV / HSBhsv(148.7, 99.4%, 71%)
CMYK99.4%, 0%, 51.9%, 29%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer111,959
CSS custom property--colour: #01B557;

Brightness & contrast

Relative luminance0.33742WCAG 2.x, 0 is black and 1 is white
Perceived brightness141.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 7.75:1
Contrast with white2.71:1WCAG normal text: Fail
Contrast with black7.75:1WCAG normal text: AAA
Greyscale equivalent#888888
Inverted#FE4AA8

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#B6A44Fno red cones; affects about 1% of men; ΔE 56.1 from the original
Deuteranopia#A5985Eno green cones; the most common form, about 1% of men; ΔE 56.2 from the original
Tritanopia#00B29Fno blue cones; rare, and affects men and women equally; ΔE 41.8 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text2.71:1WCAG large text: Fail
Contrast with black, large text7.75:1WCAG large text: AAA

Named colours

Medium seagreen · ΔE 17Forest green · ΔE 19.1Green · ΔE 23.9Light green · ΔE 25.5Medium spring green · ΔE 25.6Limegreen · ΔE 26.8
Nearest named CSS colourMedium seagreen (#3CB371)ΔE 17.03, a distinctly different colour
Hue familygreen
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#B5015F
Analogous#05B501, #01B5B1
Triadic#5701B5, #B55701
Split complementary#B101B5, #B50105
Tetradic#0105B5, #B5015F, #B5B101

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#84FEBE
Lighter +30%#51FEA4
Lighter +20%#1EFE89
Lighter +10%#01E86F
Darker −10%#01823F
Darker −20%#005026
Darker −30%#001D0E
Darker −40%#000000
More saturated +25%#00B657
Less saturated −25%#189E58

Channel breakdown

R1
G181
B87
Red1 (0.4%)
Green181 (71%)
Blue87 (34.1%)
Hue148.67°
Saturation (HSL)98.9%
Lightness35.69%
Dominant channelGreen
Hex per channelR 01 · G B5 · B 57

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Every value on this page was computed from “01b557” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.