#182240
Closest named color: Oxford Blue (#1B263B). oklch(26% 0.058 268.3), rgb(24, 34, 64).
Aa
White text reads best on this color (15.65:1).
About this color
#182240 is a dark, muted blue. In OKLCH its lightness is 26%, its chroma 0.058 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.019 away. White text reads best on it, at 15.65:1.
| Hue family | Blues |
| Lightness | dark (26%) |
| Chroma | muted (0.058) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.34:1 |
| White text | 15.65:1 |
Values
| HEX | #182240 |
| RGB | rgb(24, 34, 64) |
| HSL | hsl(225, 45%, 17%) |
| OKLCH | oklch(26% 0.058 268.3) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #182240 | 15.65:1 | AAA | Lc -105.2 | Preferred for body text |
| Black text on #182240 | 1.34:1 | Fails | Lc 0.0 | Not readable |
| #182240 text on white | 15.65:1 | AAA | Lc 102.5 | Preferred for body text |
| #182240 text on black | 1.34:1 | Fails | Lc 0.0 | Not readable |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 950.
-
Step 50
50
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E4EAF8
oklch(93.7% 0.02 267.3)
-
Step 200
200
#CED9F3
oklch(88.5% 0.038 267.3)
-
Step 300
300
#AEC0EE
oklch(81% 0.068 268.2)
-
Step 400
400
#839EE6
oklch(70.8% 0.11 267.8)
-
Step 500
500
#6584DE
oklch(63.1% 0.14 267.9)
-
Step 600
600
#4E6BCC
oklch(55.6% 0.153 268.5)
-
Step 700
700
#3F59B1
oklch(49.1% 0.143 268.4)
-
Step 800
800
#34498F
oklch(42.7% 0.118 268.5)
-
Step 900
900
#2D3E72
oklch(37.7% 0.092 268.2)
-
Step 950
950 (this color)
#182240
oklch(26% 0.058 268.3)
#182240 with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #152541 | 0.010 |
| Deuteranopia (no green cones) | #11223F | 0.010 |
| Tritanopia (no blue cones) | #04292D | 0.054 |
| Achromatopsia (no color) | #232323 | 0.058 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #182240
#182240
oklch(26% 0.058 268.3)
- #2F2200
#2F2200
oklch(26% 0.053 87.4)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #182240, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.019
- Dark #1B2431 ΔE 0.031
- Jet #212529 ΔE 0.049
- Rich Black #0D1B2A ΔE 0.050
- Space Cadet #2B2D42 ΔE 0.050
- Gunmetal #293241 ΔE 0.063
- Marine #042E60 ΔE 0.065
- Navy Blue #001146 ΔE 0.067
Use #182240 in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.