#0A152A
Closest named color: Rich Black (#0D1B2A). oklch(19.8% 0.045 262.2), rgb(10, 21, 42).
Aa
White text reads best on this color (18.20:1).
About this color
#0A152A is a very dark, muted blue. In OKLCH its lightness is 20%, its chroma 0.045 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.023 away. White text reads best on it, at 18.20:1.
| Hue family | Blues |
| Lightness | very dark (20%) |
| Chroma | muted (0.045) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.15:1 |
| White text | 18.20:1 |
Values
| HEX | #0A152A |
| RGB | rgb(10, 21, 42) |
| HSL | hsl(219, 62%, 10%) |
| OKLCH | oklch(19.8% 0.045 262.2) |
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 #0A152A | 18.20:1 | AAA | Lc -107.0 | Preferred for body text |
| Black text on #0A152A | 1.15:1 | Fails | Lc 0.0 | Not readable |
| #0A152A text on white | 18.20:1 | AAA | Lc 104.8 | Preferred for body text |
| #0A152A text on black | 1.15:1 | 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
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E4EAF5
oklch(93.6% 0.016 262.8)
-
Step 200
200
#CFDAED
oklch(88.6% 0.029 261.5)
-
Step 300
300
#AEC1E4
oklch(80.8% 0.054 262.6)
-
Step 400
400
#83A1D7
oklch(70.7% 0.086 261.9)
-
Step 500
500
#6589CC
oklch(63.2% 0.109 262.2)
-
Step 600
600
#4C71B9
oklch(55.5% 0.12 262.6)
-
Step 700
700
#3D5F9F
oklch(49.1% 0.11 262)
-
Step 800
800
#334E81
oklch(42.8% 0.091 262.1)
-
Step 900
900
#2C4168
oklch(37.7% 0.072 262)
-
Step 950
950 (this color)
#0A152A
oklch(19.8% 0.045 262.2)
#0A152A 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) | #0C172B | 0.008 |
| Deuteranopia (no green cones) | #08142A | 0.005 |
| Tritanopia (no blue cones) | #001A1D | 0.039 |
| Achromatopsia (no color) | #151515 | 0.045 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0A152A
#0A152A
oklch(19.8% 0.045 262.2)
- #1F1300
#1F1300
oklch(19.8% 0.041 80.2)
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 #0A152A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.023
- Rich Navy #001219 ΔE 0.041
- Navy Blue #001146 ΔE 0.058
- Dark #1B2431 ΔE 0.062
- Almost Black #070D0D ΔE 0.062
- Dark Navy #000435 ΔE 0.063
- Oxford Blue #1B263B ΔE 0.071
- Dark Navy Blue #00022E ΔE 0.071
Use #0A152A 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.