#255DB4#255DB4

#255DB4 is a mid, vivid blue. Relative luminance 0.115; OKLCH L 49.1% C 0.150 H 259.2°. Best body text is #FFFFFF at 6.36:1 contrast (WCAG AA passes).

Color values

HEX	#255DB4
RGB	rgb(37, 93, 180)
HSL	hsl(217, 66%, 43%)
HSV	hsv(217, 79%, 71%)
CMYK	cmyk(79.4%, 48.3%, 0%, 29.4%)
CIE-LAB	lab(40.44, 13.78, -51.35)
CIE-LCH	lch(40.44, 53.17, 285.02°)
OKLab	oklab(49.09% -0.0282 -0.1476)
OKLCH	oklch(49.09% 0.15 259.2)
XYZ	xyz(12.9125, 11.5158, 44.7134)
Luminance	0.1152 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#255DB4 #B47C25

analogous

#25A5B4 #255DB4 #3425B4

triadic

#255DB4 #B4255D #5DB425

tetradic

#255DB4 #B425A5 #B47C25 #25B434

square

#255DB4 #B425A5 #B47C25 #25B434

split-complementary

#255DB4 #B43425 #A5B425

monochromatic

#10294E #1B4381 #255DB4 #3F7BD7 #719EE2

Accessibility & contrast

On white

6.36

#255DB4 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.30

#255DB4 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #255DB4

6.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##255DB4	#FFFFFF	#000000	##FFFFFF
##255DB4	1.00	6.36	3.30	6.36
#FFFFFF	6.36	1.00	21.00	1.00
#000000	3.30	21.00	1.00	21.00
##FFFFFF	6.36	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2B66B7

Deuteranopia (green-blind)

#0059B2

Tritanopia (blue-blind)

#007280

Achromatopsia (no color)

#5F5F5F

Design tokens & code

CSS

--color: #255db4;
/* rgb */ color: rgb(37, 93, 180);
/* oklch */ color: oklch(49.1% 0.150 259.2);

Tailwind

colors: {
  custom: {
    50: '#768acb',
    500: '#255db4',
    950: '#000000',
  },
}

SCSS

$custom: #255db4;
$custom-light: #768acb;
$custom-dark: #000000;

JSON

{
  "hex": "#255db4",
  "rgb": {
    "r": 37,
    "g": 93,
    "b": 180
  },
  "hsl": {
    "h": 216.503,
    "s": 65.899,
    "l": 42.549
  },
  "oklch": {
    "l": 0.49085,
    "c": 0.15026,
    "h": 259.2
  },
  "luminance": 0.11517
}

Semantic roles & 50–950 ramp

primary

#255DB4

secondary

#C9A46C

accent

#A63FE9

background

#F7F8FC

surface

#EEF0F8

border

#C9CBD1

text

#0A0B13

muted

#7C7C82

Preview Lab

Preview with #255DB4

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

Preview Lab → · Contrast checker → · Palette generator →