#18244B
Closest named color: Oxford Blue (#1B263B). oklch(27.3% 0.074 268.3), rgb(24, 36, 75).
Aa
White text reads best on this color (15.07:1).
About this color
#18244B is a dark, moderately saturated blue. In OKLCH its lightness is 27%, its chroma 0.074 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.032 away. White text reads best on it, at 15.07:1.
| Hue family | Blues |
| Lightness | dark (27%) |
| Chroma | moderately saturated (0.074) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.39:1 |
| White text | 15.07:1 |
Values
| HEX | #18244B |
| RGB | rgb(24, 36, 75) |
| HSL | hsl(226, 52%, 19%) |
| OKLCH | oklch(27.3% 0.074 268.3) |
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 #18244B | 15.07:1 | AAA | Lc -104.6 | Preferred for body text |
| Black text on #18244B | 1.39:1 | Fails | Lc 0.0 | Not readable |
| #18244B text on white | 15.07:1 | AAA | Lc 101.8 | Preferred for body text |
| #18244B text on black | 1.39:1 | 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
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E3EAFB
oklch(93.7% 0.024 267.9)
-
Step 200
200
#CBD9FA
oklch(88.5% 0.048 267.2)
-
Step 300
300
#A9BFFA
oklch(80.9% 0.087 268.6)
-
Step 400
400
#7C9BF8
oklch(70.6% 0.141 268.7)
-
Step 500
500
#5C7FF4
oklch(63% 0.179 268.4)
-
Step 600
600
#4565E3
oklch(55.6% 0.195 268.5)
-
Step 700
700
#3753C5
oklch(49.1% 0.18 268.4)
-
Step 800
800
#2D45A0
oklch(42.8% 0.15 268.2)
-
Step 900
900
#283B7F
oklch(37.7% 0.117 268.5)
-
Step 950
950 (this color)
#18244B
oklch(27.3% 0.074 268.3)
#18244B 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) | #11294C | 0.016 |
| Deuteranopia (no green cones) | #08244A | 0.018 |
| Tritanopia (no blue cones) | #002D33 | 0.065 |
| Achromatopsia (no color) | #262626 | 0.074 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18244B
#18244B
oklch(27.3% 0.074 268.3)
- #322500
#322500
oklch(27.2% 0.056 88.7)
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 #18244B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.032
- Marine #042E60 ΔE 0.046
- Space Cadet #2B2D42 ΔE 0.049
- Dark #1B2431 ΔE 0.049
- Prussian Blue #1D3557 ΔE 0.057
- Gunmetal #293241 ΔE 0.061
- Dark Indigo #1F0954 ΔE 0.066
- Jet #212529 ΔE 0.066
Use #18244B 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.