#01233D
Closest named color: Oxford Blue (#1B263B). oklch(24.8% 0.063 246.1), rgb(1, 35, 61).
Aa
White text reads best on this color (16.04:1).
About this color
#01233D is a very dark, muted blue. In OKLCH its lightness is 25%, its chroma 0.063 and its hue 246°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.033 away. White text reads best on it, at 16.04:1.
| Hue family | Blues |
| Lightness | very dark (25%) |
| Chroma | muted (0.063) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.30:1 |
| White text | 16.04:1 |
Values
| HEX | #01233D |
| RGB | rgb(1, 35, 61) |
| HSL | hsl(206, 97%, 12%) |
| OKLCH | oklch(24.8% 0.063 246.1) |
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 #01233D | 16.04:1 | AAA | Lc -105.3 | Preferred for body text |
| Black text on #01233D | 1.30:1 | Fails | Lc 0.0 | Not readable |
| #01233D text on white | 16.04:1 | AAA | Lc 102.7 | Preferred for body text |
| #01233D text on black | 1.30:1 | 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
#DFECF8
oklch(93.7% 0.021 245.9)
-
Step 200
200
#C4DDF3
oklch(88.6% 0.04 244.8)
-
Step 300
300
#9AC6EE
oklch(80.9% 0.074 246.3)
-
Step 400
400
#5DA7E6
oklch(70.7% 0.119 246.2)
-
Step 500
500
#208FDF
oklch(63% 0.152 246.4)
-
Step 600
600
#0078C1
oklch(55.5% 0.143 246.2)
-
Step 700
700
#0065A3
oklch(49.1% 0.126 245.9)
-
Step 800
800
#005287
oklch(42.6% 0.111 246.5)
-
Step 900
900
#004572
oklch(37.9% 0.097 246)
-
Step 950
950 (this color)
#01233D
oklch(24.8% 0.063 246.1)
#01233D 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) | #16243E | 0.023 |
| Deuteranopia (no green cones) | #0D1F3D | 0.016 |
| Tritanopia (no blue cones) | #00292D | 0.042 |
| Achromatopsia (no color) | #212121 | 0.063 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #01233D
#01233D
oklch(24.8% 0.063 246.1)
- #331B00
#331B00
oklch(24.9% 0.056 65.9)
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 #01233D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.033
- Dark #1B2431 ΔE 0.037
- Rich Black #0D1B2A ΔE 0.041
- Jet #212529 ΔE 0.055
- Navy Blue #001146 ΔE 0.060
- Space Cadet #2B2D42 ΔE 0.068
- Marine #042E60 ΔE 0.070
- Gunmetal #293241 ΔE 0.075
Use #01233D 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.