#24283F
Closest named color: Oxford Blue (#1B263B). oklch(28.4% 0.043 275.8), rgb(36, 40, 63).
Aa
White text reads best on this color (14.47:1).
About this color
#24283F is a dark, muted blue. In OKLCH its lightness is 28%, its chroma 0.043 and its hue 276°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.018 away. White text reads best on it, at 14.47:1.
| Hue family | Blues |
| Lightness | dark (28%) |
| Chroma | muted (0.043) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.45:1 |
| White text | 14.47:1 |
Values
| HEX | #24283F |
| RGB | rgb(36, 40, 63) |
| HSL | hsl(231, 27%, 19%) |
| OKLCH | oklch(28.4% 0.043 275.8) |
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 #24283F | 14.47:1 | AAA | Lc -104.1 | Preferred for body text |
| Black text on #24283F | 1.45:1 | Fails | Lc 0.0 | Not readable |
| #24283F text on white | 14.47:1 | AAA | Lc 101.2 | Preferred for body text |
| #24283F text on black | 1.45:1 | 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
#F4F5FA
oklch(97.1% 0.007 277.2)
-
Step 100
100
#E7E9F4
oklch(93.6% 0.015 277.8)
-
Step 200
200
#D4D8EC
oklch(88.5% 0.028 276.8)
-
Step 300
300
#B7BFE2
oklch(81% 0.05 275.1)
-
Step 400
400
#929DD3
oklch(70.7% 0.08 275.3)
-
Step 500
500
#7884C8
oklch(63.2% 0.103 275.4)
-
Step 600
600
#626CB4
oklch(55.6% 0.112 276.1)
-
Step 700
700
#515A9B
oklch(49.1% 0.104 275.9)
-
Step 800
800
#424A7E
oklch(42.7% 0.087 275.5)
-
Step 900
900
#383E65
oklch(37.7% 0.067 276)
-
Step 950
950 (this color)
#24283F
oklch(28.4% 0.043 275.8)
#24283F 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) | #212A40 | 0.007 |
| Deuteranopia (no green cones) | #1F283E | 0.008 |
| Tritanopia (no blue cones) | #1C2C30 | 0.037 |
| Achromatopsia (no color) | #292929 | 0.043 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #24283F
#24283F
oklch(28.4% 0.043 275.8)
- #302A0F
#302A0F
oklch(28.5% 0.043 97)
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 #24283F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.018
- Space Cadet #2B2D42 ΔE 0.021
- Dark #1B2431 ΔE 0.032
- Gunmetal #293241 ΔE 0.035
- Jet #212529 ΔE 0.041
- Prussian Blue #1D3557 ΔE 0.053
- Dark Blue Grey #1F3B4D ΔE 0.062
- Midnight Green #073B4C ΔE 0.064
Use #24283F 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.