#01203E
Closest named color: Rich Black (#0D1B2A). oklch(24.1% 0.068 250.9), rgb(1, 32, 62).
Aa
White text reads best on this color (16.43:1).
About this color
#01203E is a very dark, muted blue. In OKLCH its lightness is 24%, its chroma 0.068 and its hue 251°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.040 away. White text reads best on it, at 16.43:1.
| Hue family | Blues |
| Lightness | very dark (24%) |
| Chroma | muted (0.068) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.27:1 |
| White text | 16.43:1 |
Values
| HEX | #01203E |
| RGB | rgb(1, 32, 62) |
| HSL | hsl(210, 97%, 12%) |
| OKLCH | oklch(24.1% 0.068 250.9) |
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 #01203E | 16.43:1 | AAA | Lc -105.6 | Preferred for body text |
| Black text on #01203E | 1.27:1 | Fails | Lc 0.0 | Not readable |
| #01203E text on white | 16.43:1 | AAA | Lc 103.1 | Preferred for body text |
| #01203E 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
#F0F6FD
oklch(97.1% 0.011 252.1)
-
Step 100
100
#DFEBF9
oklch(93.5% 0.023 252.2)
-
Step 200
200
#C4DCF6
oklch(88.5% 0.044 250.4)
-
Step 300
300
#9AC5F3
oklch(80.9% 0.08 250.5)
-
Step 400
400
#5FA5EE
oklch(70.7% 0.129 251)
-
Step 500
500
#288CE8
oklch(63.1% 0.164 251)
-
Step 600
600
#0075CD
oklch(55.6% 0.161 250.9)
-
Step 700
700
#0062AD
oklch(49.1% 0.142 250.8)
-
Step 800
800
#00508F
oklch(42.6% 0.123 250.8)
-
Step 900
900
#034378
oklch(37.8% 0.107 250.8)
-
Step 950
950 (this color)
#01203E
oklch(24.1% 0.068 250.9)
#01203E 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) | #10223F | 0.018 |
| Deuteranopia (no green cones) | #051D3D | 0.010 |
| Tritanopia (no blue cones) | #00272B | 0.050 |
| Achromatopsia (no color) | #1F1F1F | 0.068 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #01203E
#01203E
oklch(24.1% 0.068 250.9)
- #2E1A00
#2E1A00
oklch(23.9% 0.051 70.9)
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 #01203E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.040
- Oxford Blue #1B263B ΔE 0.040
- Dark #1B2431 ΔE 0.044
- Navy Blue #001146 ΔE 0.049
- Jet #212529 ΔE 0.062
- Marine #042E60 ΔE 0.074
- Space Cadet #2B2D42 ΔE 0.075
- Night Blue #040348 ΔE 0.077
Use #01203E 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.