#0A2438
Closest named color: Oxford Blue (#1B263B). oklch(25.2% 0.049 245), rgb(10, 36, 56).
Aa
White text reads best on this color (15.88:1).
About this color
#0A2438 is a dark, muted blue. In OKLCH its lightness is 25%, its chroma 0.049 and its hue 245°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.024 away. White text reads best on it, at 15.88:1.
| Hue family | Blues |
| Lightness | dark (25%) |
| Chroma | muted (0.049) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.32:1 |
| White text | 15.88:1 |
Values
| HEX | #0A2438 |
| RGB | rgb(10, 36, 56) |
| HSL | hsl(206, 70%, 13%) |
| OKLCH | oklch(25.2% 0.049 245) |
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 #0A2438 | 15.88:1 | AAA | Lc -105.3 | Preferred for body text |
| Black text on #0A2438 | 1.32:1 | Fails | Lc 0.0 | Not readable |
| #0A2438 text on white | 15.88:1 | AAA | Lc 102.7 | Preferred for body text |
| #0A2438 text on black | 1.32:1 | 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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E1EBF5
oklch(93.5% 0.017 248)
-
Step 200
200
#C8DCEE
oklch(88.5% 0.033 245.3)
-
Step 300
300
#A2C5E4
oklch(80.8% 0.058 245.3)
-
Step 400
400
#6DA7D7
oklch(70.7% 0.093 244.6)
-
Step 500
500
#4290CD
oklch(63.2% 0.12 245)
-
Step 600
600
#1A79BA
oklch(55.7% 0.13 245.1)
-
Step 700
700
#0765A0
oklch(49% 0.121 245.3)
-
Step 800
800
#0E5382
oklch(42.7% 0.101 245.1)
-
Step 900
900
#164568
oklch(37.7% 0.078 244.8)
-
Step 950
950 (this color)
#0A2438
oklch(25.2% 0.049 245)
#0A2438 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) | #1B2539 | 0.022 |
| Deuteranopia (no green cones) | #152038 | 0.017 |
| Tritanopia (no blue cones) | #00292B | 0.036 |
| Achromatopsia (no color) | #222222 | 0.049 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0A2438
#0A2438
oklch(25.2% 0.049 245)
- #321C05
#321C05
oklch(25.1% 0.049 63.8)
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 #0A2438, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.024
- Dark #1B2431 ΔE 0.024
- Rich Black #0D1B2A ΔE 0.037
- Jet #212529 ΔE 0.041
- Space Cadet #2B2D42 ΔE 0.060
- Gunmetal #293241 ΔE 0.068
- Navy Blue #001146 ΔE 0.070
- Marine #042E60 ΔE 0.076
Use #0A2438 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.