#00203D
Closest named color: Rich Black (#0D1B2A). oklch(23.9% 0.067 249.5), rgb(0, 32, 61).
Aa
White text reads best on this color (16.48:1).
About this color
#00203D is a very dark, muted blue. In OKLCH its lightness is 24%, its chroma 0.067 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.038 away. White text reads best on it, at 16.48:1.
| Hue family | Blues |
| Lightness | very dark (24%) |
| Chroma | muted (0.067) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.27:1 |
| White text | 16.48:1 |
Values
| HEX | #00203D |
| RGB | rgb(0, 32, 61) |
| HSL | hsl(209, 100%, 12%) |
| OKLCH | oklch(23.9% 0.067 249.5) |
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 #00203D | 16.48:1 | AAA | Lc -105.7 | Preferred for body text |
| Black text on #00203D | 1.27:1 | Fails | Lc 0.0 | Not readable |
| #00203D text on white | 16.48:1 | AAA | Lc 103.1 | Preferred for body text |
| #00203D text on black | 1.27:1 | 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
#F0F6FC
oklch(97% 0.01 247.9)
-
Step 100
100
#DFECF9
oklch(93.7% 0.022 248.1)
-
Step 200
200
#C4DCF6
oklch(88.5% 0.044 250.4)
-
Step 300
300
#99C5F2
oklch(80.8% 0.079 249.4)
-
Step 400
400
#5EA6EC
oklch(70.8% 0.126 249.4)
-
Step 500
500
#238DE6
oklch(63.1% 0.162 249.5)
-
Step 600
600
#0076C9
oklch(55.6% 0.155 249.4)
-
Step 700
700
#0063AA
oklch(49.1% 0.137 249.4)
-
Step 800
800
#00518D
oklch(42.7% 0.12 249.5)
-
Step 900
900
#004376
oklch(37.6% 0.105 249.5)
-
Step 950
950 (this color)
#00203D
oklch(23.9% 0.067 249.5)
#00203D 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) | #11223E | 0.020 |
| Deuteranopia (no green cones) | #061C3C | 0.013 |
| Tritanopia (no blue cones) | #00272B | 0.048 |
| Achromatopsia (no color) | #1F1F1F | 0.067 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #00203D
#00203D
oklch(23.9% 0.067 249.5)
- #2F1A00
#2F1A00
oklch(24.1% 0.052 69.3)
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 #00203D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.038
- Oxford Blue #1B263B ΔE 0.041
- Dark #1B2431 ΔE 0.044
- Navy Blue #001146 ΔE 0.049
- Jet #212529 ΔE 0.062
- Marine #042E60 ΔE 0.076
- Space Cadet #2B2D42 ΔE 0.076
- Night Blue #040348 ΔE 0.077
Use #00203D 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.