#0A2637
Closest named color: Dark (#1B2431). oklch(25.7% 0.046 239), rgb(10, 38, 55).
Aa
White text reads best on this color (15.60:1).
About this color
#0A2637 is a dark, muted blue. In OKLCH its lightness is 26%, its chroma 0.046 and its hue 239°. Its hue sits on the cool side of the wheel. The nearest named color is Dark (#1B2431), ΔE 0.022 away. White text reads best on it, at 15.60:1.
| Hue family | Blues |
| Lightness | dark (26%) |
| Chroma | muted (0.046) |
| Temperature | cool |
| Nearest name | Dark (#1B2431) |
| Black text | 1.34:1 |
| White text | 15.60:1 |
Values
| HEX | #0A2637 |
| RGB | rgb(10, 38, 55) |
| HSL | hsl(203, 69%, 13%) |
| OKLCH | oklch(25.7% 0.046 239) |
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 #0A2637 | 15.60:1 | AAA | Lc -105.1 | Preferred for body text |
| Black text on #0A2637 | 1.34:1 | Fails | Lc 0.0 | Not readable |
| #0A2637 text on white | 15.60:1 | AAA | Lc 102.4 | Preferred for body text |
| #0A2637 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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E1ECF3
oklch(93.7% 0.015 235.4)
-
Step 200
200
#C8DCEB
oklch(88.4% 0.03 240.2)
-
Step 300
300
#A1C6E1
oklch(80.9% 0.055 240)
-
Step 400
400
#6BA8D1
oklch(70.6% 0.087 239.1)
-
Step 500
500
#3E92C6
oklch(63.1% 0.112 239.3)
-
Step 600
600
#0E7BB2
oklch(55.5% 0.122 239.2)
-
Step 700
700
#006898
oklch(49.2% 0.11 238.7)
-
Step 800
800
#06557C
oklch(42.8% 0.093 238.6)
-
Step 900
900
#134664
oklch(37.6% 0.073 239.3)
-
Step 950
950 (this color)
#0A2637
oklch(25.7% 0.046 239)
#0A2637 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) | #1E2638 | 0.025 |
| Deuteranopia (no green cones) | #182237 | 0.020 |
| Tritanopia (no blue cones) | #002A2C | 0.031 |
| Achromatopsia (no color) | #242424 | 0.046 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0A2637
#0A2637
oklch(25.7% 0.046 239)
- #341D0A
#341D0A
oklch(25.7% 0.047 57.9)
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 #0A2637, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark #1B2431 ΔE 0.022
- Oxford Blue #1B263B ΔE 0.022
- Jet #212529 ΔE 0.037
- Rich Black #0D1B2A ΔE 0.041
- Space Cadet #2B2D42 ΔE 0.057
- Gunmetal #293241 ΔE 0.062
- Midnight Green #073B4C ΔE 0.074
- Marine #042E60 ΔE 0.076
Use #0A2637 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.