#10202D
Closest named color: Rich Black (#0D1B2A). oklch(23.6% 0.033 244.4), rgb(16, 32, 45).
Aa
White text reads best on this color (16.58:1).
About this color
#10202D is a very dark, muted blue. In OKLCH its lightness is 24%, its chroma 0.033 and its hue 244°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.019 away. White text reads best on it, at 16.58:1.
| Hue family | Blues |
| Lightness | very dark (24%) |
| Chroma | muted (0.033) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.26:1 |
| White text | 16.58:1 |
Values
| HEX | #10202D |
| RGB | rgb(16, 32, 45) |
| HSL | hsl(207, 48%, 12%) |
| OKLCH | oklch(23.6% 0.033 244.4) |
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 #10202D | 16.58:1 | AAA | Lc -105.9 | Preferred for body text |
| Black text on #10202D | 1.26:1 | Fails | Lc 0.0 | Not readable |
| #10202D text on white | 16.58:1 | AAA | Lc 103.5 | Preferred for body text |
| #10202D text on black | 1.26:1 | 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
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E4EBF1
oklch(93.6% 0.011 243.7)
-
Step 200
200
#CEDBE7
oklch(88.5% 0.022 245.9)
-
Step 300
300
#ACC4D9
oklch(80.9% 0.04 244.7)
-
Step 400
400
#7FA5C6
oklch(70.6% 0.064 245.1)
-
Step 500
500
#5E8FB7
oklch(63.1% 0.08 244.2)
-
Step 600
600
#4379A3
oklch(55.7% 0.087 243.8)
-
Step 700
700
#35658C
oklch(49.1% 0.082 245.1)
-
Step 800
800
#2C5371
oklch(42.7% 0.067 243.5)
-
Step 900
900
#28455C
oklch(37.8% 0.053 243.8)
-
Step 950
950 (this color)
#10202D
oklch(23.6% 0.033 244.4)
#10202D 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) | #1A202E | 0.015 |
| Deuteranopia (no green cones) | #171D2D | 0.014 |
| Tritanopia (no blue cones) | #022324 | 0.028 |
| Achromatopsia (no color) | #1E1E1E | 0.033 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #10202D
#10202D
oklch(23.6% 0.033 244.4)
- #291B0D
#291B0D
oklch(23.6% 0.033 65.1)
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 #10202D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.019
- Dark #1B2431 ΔE 0.023
- Jet #212529 ΔE 0.035
- Oxford Blue #1B263B ΔE 0.036
- Rich Navy #001219 ΔE 0.068
- Space Cadet #2B2D42 ΔE 0.072
- Navy Blue #001146 ΔE 0.076
- Gunmetal #293241 ΔE 0.080
Use #10202D 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.