#04233E
Closest named color: Oxford Blue (#1B263B). oklch(25% 0.062 248.9), rgb(4, 35, 62).
Aa
White text reads best on this color (15.96:1).
About this color
#04233E is a dark, muted blue. In OKLCH its lightness is 25%, its chroma 0.062 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.030 away. White text reads best on it, at 15.96:1.
| Hue family | Blues |
| Lightness | dark (25%) |
| Chroma | muted (0.062) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.31:1 |
| White text | 15.96:1 |
Values
| HEX | #04233E |
| RGB | rgb(4, 35, 62) |
| HSL | hsl(208, 88%, 13%) |
| OKLCH | oklch(25% 0.062 248.9) |
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 #04233E | 15.96:1 | AAA | Lc -105.3 | Preferred for body text |
| Black text on #04233E | 1.31:1 | Fails | Lc 0.0 | Not readable |
| #04233E text on white | 15.96:1 | AAA | Lc 102.7 | Preferred for body text |
| #04233E text on black | 1.31:1 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#DFEBF8
oklch(93.5% 0.022 250.2)
-
Step 200
200
#C5DCF4
oklch(88.5% 0.041 249.4)
-
Step 300
300
#9CC5EF
oklch(80.9% 0.074 249.4)
-
Step 400
400
#62A6E7
oklch(70.7% 0.118 248.8)
-
Step 500
500
#2E8EE0
oklch(63.2% 0.151 248.9)
-
Step 600
600
#0076C8
oklch(55.5% 0.154 249.2)
-
Step 700
700
#0063A9
oklch(49% 0.136 249.1)
-
Step 800
800
#00518C
oklch(42.7% 0.118 249.2)
-
Step 900
900
#074473
oklch(37.8% 0.098 248.6)
-
Step 950
950 (this color)
#04233E
oklch(25% 0.062 248.9)
#04233E 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) | #16253F | 0.021 |
| Deuteranopia (no green cones) | #0D1F3D | 0.014 |
| Tritanopia (no blue cones) | #00292D | 0.044 |
| Achromatopsia (no color) | #222222 | 0.063 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #04233E
#04233E
oklch(25% 0.062 248.9)
- #321C00
#321C00
oklch(25% 0.054 69.4)
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 #04233E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.030
- Dark #1B2431 ΔE 0.036
- Rich Black #0D1B2A ΔE 0.042
- Jet #212529 ΔE 0.054
- Navy Blue #001146 ΔE 0.060
- Space Cadet #2B2D42 ΔE 0.065
- Marine #042E60 ΔE 0.068
- Gunmetal #293241 ΔE 0.073
Use #04233E 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.