#255AAB#255AAB

#255AAB is a mid, vivid blue. Relative luminance 0.106; OKLCH L 47.8% C 0.142 H 258.9°. Best body text is #FFFFFF at 6.71:1 contrast (WCAG AA passes).

Color values

HEX	#255AAB
RGB	rgb(37, 90, 171)
HSL	hsl(216, 64%, 41%)
HSV	hsv(216, 78%, 67%)
CMYK	cmyk(78.4%, 47.4%, 0%, 32.9%)
CIE-LAB	lab(38.98, 12.24, -48.40)
CIE-LCH	lch(38.98, 49.92, 284.19°)
OKLab	oklab(47.77% -0.0272 -0.139)
OKLCH	oklch(47.77% 0.142 258.9)
XYZ	xyz(11.7671, 10.6445, 39.9546)
Luminance	0.1065 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#255AAB #AB7625

analogous

#259DAB #255AAB #3325AB

triadic

#255AAB #AB255A #5AAB25

tetradic

#255AAB #AB259D #AB7625 #25AB33

square

#255AAB #AB259D #AB7625 #25AB33

split-complementary

#255AAB #AB3325 #9DAB25

monochromatic

#0F2546 #1A4079 #255AAB #3976D4 #6B99DF

Accessibility & contrast

On white

6.71

#255AAB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.13

#255AAB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #255AAB

6.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##255AAB	#FFFFFF	#000000	##FFFFFF
##255AAB	1.00	6.71	3.13	6.71
#FFFFFF	6.71	1.00	21.00	1.00
#000000	3.13	21.00	1.00	21.00
##FFFFFF	6.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2E62AE

Deuteranopia (green-blind)

#0656A9

Tritanopia (blue-blind)

#006D7A

Achromatopsia (no color)

#5C5C5C

Design tokens & code

CSS

--color: #255aab;
/* rgb */ color: rgb(37, 90, 171);
/* oklch */ color: oklch(47.8% 0.142 258.9);

Tailwind

colors: {
  custom: {
    50: '#7488c4',
    500: '#255aab',
    950: '#000000',
  },
}

SCSS

$custom: #255aab;
$custom-light: #7488c4;
$custom-dark: #000000;

JSON

{
  "hex": "#255aab",
  "rgb": {
    "r": 37,
    "g": 90,
    "b": 171
  },
  "hsl": {
    "h": 216.269,
    "s": 64.423,
    "l": 40.784
  },
  "oklch": {
    "l": 0.4777,
    "c": 0.14161,
    "h": 258.9
  },
  "luminance": 0.10646
}

Semantic roles & 50–950 ramp

primary

#255AAB

secondary

#C5A067

accent

#A540E7

background

#F7F8FC

surface

#EEEFF8

border

#C9CAD1

text

#090B13

muted

#7B7C82

Preview Lab

Preview with #255AAB

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

Preview Lab → · Contrast checker → · Palette generator →