#255AA5#255AA5

#255AA5 is a mid, vivid blue. Relative luminance 0.104; OKLCH L 47.3% C 0.133 H 257.7°. Best body text is #FFFFFF at 6.81:1 contrast (WCAG AA passes).

Color values

HEX	#255AA5
RGB	rgb(37, 90, 165)
HSL	hsl(215, 63%, 40%)
HSV	hsv(215, 78%, 65%)
CMYK	cmyk(77.6%, 45.5%, 0%, 35.3%)
CIE-LAB	lab(38.59, 9.90, -45.46)
CIE-LCH	lch(38.59, 46.53, 282.28°)
OKLab	oklab(47.35% -0.0283 -0.1303)
OKLCH	oklch(47.35% 0.133 257.7)
XYZ	xyz(11.2082, 10.4210, 37.0108)
Luminance	0.1042 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#255AA5 #A57025

analogous

#259AA5 #255AA5 #3025A5

triadic

#255AA5 #A5255A #5AA525

tetradic

#255AA5 #A5259A #A57025 #25A530

square

#255AA5 #A5259A #A57025 #25A530

split-complementary

#255AA5 #A53025 #9AA525

monochromatic

#0F2341 #1A3F73 #255AA5 #3576D2 #6798DD

Accessibility & contrast

On white

6.81

#255AA5 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.08

#255AA5 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #255AA5

6.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##255AA5	#FFFFFF	#000000	##FFFFFF
##255AA5	1.00	6.81	3.08	6.81
#FFFFFF	6.81	1.00	21.00	1.00
#000000	3.08	21.00	1.00	21.00
##FFFFFF	6.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3361A8

Deuteranopia (green-blind)

#1855A3

Tritanopia (blue-blind)

#006C77

Achromatopsia (no color)

#5B5B5B

Design tokens & code

CSS

--color: #255aa5;
/* rgb */ color: rgb(37, 90, 165);
/* oklch */ color: oklch(47.3% 0.133 257.7);

Tailwind

colors: {
  custom: {
    50: '#7388c0',
    500: '#255aa5',
    950: '#000000',
  },
}

SCSS

$custom: #255aa5;
$custom-light: #7388c0;
$custom-dark: #000000;

JSON

{
  "hex": "#255aa5",
  "rgb": {
    "r": 37,
    "g": 90,
    "b": 165
  },
  "hsl": {
    "h": 215.156,
    "s": 63.366,
    "l": 39.608
  },
  "oklch": {
    "l": 0.47347,
    "c": 0.13336,
    "h": 257.7
  },
  "luminance": 0.10422
}

Semantic roles & 50–950 ramp

primary

#255AA5

secondary

#C39B63

accent

#A241E6

background

#F7F8FB

surface

#EDEFF7

border

#C8CAD0

text

#090B12

muted

#7B7C81

Preview Lab

Preview with #255AA5

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

Preview Lab → · Contrast checker → · Palette generator →