#255E9B#255E9B

#255E9B is a mid, moderate cyan. Relative luminance 0.108; OKLCH L 47.6% C 0.115 H 252.7°. Best body text is #FFFFFF at 6.66:1 contrast (WCAG AA passes).

Color values

HEX	#255E9B
RGB	rgb(37, 94, 155)
HSL	hsl(211, 61%, 38%)
HSV	hsv(211, 76%, 61%)
CMYK	cmyk(76.1%, 39.4%, 0%, 39.2%)
CIE-LAB	lab(39.18, 3.43, -38.55)
CIE-LCH	lch(39.18, 38.70, 275.08°)
OKLab	oklab(47.61% -0.0341 -0.1099)
OKLCH	oklch(47.61% 0.115 252.7)
XYZ	xyz(10.6798, 10.7641, 32.5188)
Luminance	0.1076 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#255E9B #9B6225

analogous

#25999B #255E9B #27259B

triadic

#255E9B #9B255E #5E9B25

tetradic

#255E9B #9B2599 #9B6225 #259B27

square

#255E9B #9B2599 #9B6225 #259B27

split-complementary

#255E9B #9B2725 #999B25

monochromatic

#0D2238 #19406A #255E9B #317CCC #619BD9

Accessibility & contrast

On white

6.66

#255E9B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.15

#255E9B on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #255E9B

6.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##255E9B	#FFFFFF	#000000	##FFFFFF
##255E9B	1.00	6.66	3.15	6.66
#FFFFFF	6.66	1.00	21.00	1.00
#000000	3.15	21.00	1.00	21.00
##FFFFFF	6.66	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#41629D

Deuteranopia (green-blind)

#2F579A

Tritanopia (blue-blind)

#006C75

Achromatopsia (no color)

#5C5C5C

Design tokens & code

CSS

--color: #255e9b;
/* rgb */ color: rgb(37, 94, 155);
/* oklch */ color: oklch(47.6% 0.115 252.7);

Tailwind

colors: {
  custom: {
    50: '#708bb9',
    500: '#255e9b',
    950: '#000000',
  },
}

SCSS

$custom: #255e9b;
$custom-light: #708bb9;
$custom-dark: #000000;

JSON

{
  "hex": "#255e9b",
  "rgb": {
    "r": 37,
    "g": 94,
    "b": 155
  },
  "hsl": {
    "h": 211.017,
    "s": 61.458,
    "l": 37.647
  },
  "oklch": {
    "l": 0.47611,
    "c": 0.11512,
    "h": 252.7
  },
  "luminance": 0.10765
}

Semantic roles & 50–950 ramp

primary

#255E9B

secondary

#BF905D

accent

#9743E5

background

#F7F8FB

surface

#EDF0F6

border

#C8CBD0

text

#090B11

muted

#7B7C80

Preview Lab

Preview with #255E9B

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →