#05233D
Closest named color: Oxford Blue (#1B263B). oklch(25% 0.06 248.7), rgb(5, 35, 61).
Aa
White text reads best on this color (15.97:1).
About this color
#05233D is a dark, muted blue. In OKLCH its lightness is 25%, its chroma 0.060 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.029 away. White text reads best on it, at 15.97:1.
| Hue family | Blues |
| Lightness | dark (25%) |
| Chroma | muted (0.060) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.31:1 |
| White text | 15.97:1 |
Values
| HEX | #05233D |
| RGB | rgb(5, 35, 61) |
| HSL | hsl(208, 85%, 13%) |
| OKLCH | oklch(25% 0.06 248.7) |
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 #05233D | 15.97:1 | AAA | Lc -105.3 | Preferred for body text |
| Black text on #05233D | 1.31:1 | Fails | Lc 0.0 | Not readable |
| #05233D text on white | 15.97:1 | AAA | Lc 102.7 | Preferred for body text |
| #05233D 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
#E0EBF7
oklch(93.5% 0.02 250.4)
-
Step 200
200
#C5DCF3
oklch(88.5% 0.04 248.3)
-
Step 300
300
#9DC5ED
oklch(80.9% 0.071 248.7)
-
Step 400
400
#64A6E5
oklch(70.7% 0.115 248.7)
-
Step 500
500
#328EDD
oklch(63.1% 0.146 248.6)
-
Step 600
600
#0077C7
oklch(55.7% 0.152 248.5)
-
Step 700
700
#0063A8
oklch(49% 0.134 248.8)
-
Step 800
800
#00518B
oklch(42.6% 0.117 248.8)
-
Step 900
900
#0B4471
oklch(37.7% 0.095 248.3)
-
Step 950
950 (this color)
#05233D
oklch(25% 0.06 248.7)
#05233D 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) | #17243E | 0.021 |
| Deuteranopia (no green cones) | #0E1F3C | 0.014 |
| Tritanopia (no blue cones) | #00292D | 0.042 |
| Achromatopsia (no color) | #222222 | 0.061 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #05233D
#05233D
oklch(25% 0.06 248.7)
- #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 #05233D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.029
- Dark #1B2431 ΔE 0.034
- Rich Black #0D1B2A ΔE 0.041
- Jet #212529 ΔE 0.052
- Navy Blue #001146 ΔE 0.061
- Space Cadet #2B2D42 ΔE 0.065
- Marine #042E60 ΔE 0.070
- Gunmetal #293241 ΔE 0.073
Use #05233D 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.