#5B91EC#5B91EC

#5B91EC is a light, vivid blue. Relative luminance 0.285; OKLCH L 66.1% C 0.148 H 260.3°. Best body text is #000000 at 6.71:1 contrast (WCAG AA passes).

Color values

HEX	#5B91EC
RGB	rgb(91, 145, 236)
HSL	hsl(218, 79%, 64%)
HSV	hsv(218, 61%, 93%)
CMYK	cmyk(61.4%, 38.6%, 0%, 7.5%)
CIE-LAB	lab(60.36, 9.66, -51.25)
CIE-LCH	lch(60.36, 52.15, 280.68°)
OKLab	oklab(66.12% -0.025 -0.1456)
OKLCH	oklch(66.12% 0.148 260.3)
XYZ	xyz(29.5748, 28.5284, 83.2886)
Luminance	0.2853 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5B91EC #ECB65B

analogous

#5BDAEC #5B91EC #6E5BEC

triadic

#5B91EC #EC5B91 #91EC5B

tetradic

#5B91EC #EC5BDA #ECB65B #5BEC6E

square

#5B91EC #EC5BDA #ECB65B #5BEC6E

split-complementary

#5B91EC #EC6E5B #DAEC5B

monochromatic

#1552B7 #246CE6 #5B91EC #92B6F2 #C9DBF9

Accessibility & contrast

On white

3.13

#5B91EC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.71

#5B91EC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #5B91EC

6.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5B91EC	#FFFFFF	#000000	##000000
##5B91EC	1.00	3.13	6.71	6.71
#FFFFFF	3.13	1.00	21.00	21.00
#000000	6.71	21.00	1.00	1.00
##000000	6.71	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6999F0

Deuteranopia (green-blind)

#558BEA

Tritanopia (blue-blind)

#00A6B3

Achromatopsia (no color)

#929292

Design tokens & code

CSS

--color: #5b91ec;
/* rgb */ color: rgb(91, 145, 236);
/* oklch */ color: oklch(66.1% 0.148 260.3);

Tailwind

colors: {
  custom: {
    50: '#95b0f2',
    500: '#5b91ec',
    950: '#000000',
  },
}

SCSS

$custom: #5b91ec;
$custom-light: #95b0f2;
$custom-dark: #000000;

JSON

{
  "hex": "#5b91ec",
  "rgb": {
    "r": 91,
    "g": 145,
    "b": 236
  },
  "hsl": {
    "h": 217.655,
    "s": 79.235,
    "l": 64.118
  },
  "oklch": {
    "l": 0.66118,
    "c": 0.14778,
    "h": 260.3
  },
  "luminance": 0.28531
}

Semantic roles & 50–950 ramp

primary

#5B91EC

secondary

#EBD8B8

accent

#8D0ADC

background

#F9FAFE

surface

#F2F4FD

border

#CCCED5

text

#0E1017

muted

#7E7F85

Preview Lab

Preview with #5B91EC

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

Preview Lab → · Contrast checker → · Palette generator →