#1833B4#1833B4

#1833B4 is a dark, highly saturated blue. Relative luminance 0.059; OKLCH L 40.5% C 0.203 H 266.4°. Best body text is #FFFFFF at 9.67:1 contrast (WCAG AA passes).

Color values

HEX	#1833B4
RGB	rgb(24, 51, 180)
HSL	hsl(230, 76%, 40%)
HSV	hsv(230, 87%, 71%)
CMYK	cmyk(86.7%, 71.7%, 0%, 29.4%)
CIE-LAB	lab(29.05, 40.26, -69.96)
CIE-LCH	lch(29.05, 80.72, 299.92°)
OKLab	oklab(40.46% -0.0128 -0.2029)
OKLCH	oklch(40.46% 0.203 266.4)
XYZ	xyz(9.7959, 5.8559, 43.7852)
Luminance	0.0586 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1833B4 #B49918

analogous

#1881B4 #1833B4 #4B18B4

triadic

#1833B4 #B41833 #33B418

tetradic

#1833B4 #B41881 #B49918 #18B44B

square

#1833B4 #B41881 #B49918 #18B44B

split-complementary

#1833B4 #B44B18 #81B418

monochromatic

#0A1448 #11247E #1833B4 #2747E2 #5D75E9

Accessibility & contrast

On white

9.67

#1833B4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.17

#1833B4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1833B4

9.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1833B4	#FFFFFF	#000000	##FFFFFF
##1833B4	1.00	9.67	2.17	9.67
#FFFFFF	9.67	1.00	21.00	1.00
#000000	2.17	21.00	1.00	21.00
##FFFFFF	9.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004CB8

Deuteranopia (green-blind)

#003DB2

Tritanopia (blue-blind)

#005870

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #1833b4;
/* rgb */ color: rgb(24, 51, 180);
/* oklch */ color: oklch(40.5% 0.203 266.4);

Tailwind

colors: {
  custom: {
    50: '#766bcc',
    500: '#1833b4',
    950: '#000000',
  },
}

SCSS

$custom: #1833b4;
$custom-light: #766bcc;
$custom-dark: #000000;

JSON

{
  "hex": "#1833b4",
  "rgb": {
    "r": 24,
    "g": 51,
    "b": 180
  },
  "hsl": {
    "h": 229.615,
    "s": 76.471,
    "l": 40
  },
  "oklch": {
    "l": 0.40455,
    "c": 0.20327,
    "h": 266.4
  },
  "luminance": 0.05857
}

Semantic roles & 50–950 ramp

primary

#1833B4

secondary

#CDB95B

accent

#D235F3

background

#F8F6FC

surface

#EFEBF9

border

#CAC6D2

text

#0A0614

muted

#7C7A82

Preview Lab

Preview with #1833B4

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

Preview Lab → · Contrast checker → · Palette generator →