#05223C
Closest named color: Oxford Blue (#1B263B). oklch(24.6% 0.06 249.3), rgb(5, 34, 60).
Aa
White text reads best on this color (16.14:1).
About this color
#05223C is a very 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 0.031 away. White text reads best on it, at 16.14:1.
| Hue family | Blues |
| Lightness | very dark (25%) |
| Chroma | muted (0.060) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.30:1 |
| White text | 16.14:1 |
Values
| HEX | #05223C |
| RGB | rgb(5, 34, 60) |
| HSL | hsl(208, 85%, 13%) |
| OKLCH | oklch(24.6% 0.06 249.3) |
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 #05223C | 16.14:1 | AAA | Lc -105.5 | Preferred for body text |
| Black text on #05223C | 1.30:1 | Fails | Lc 0.0 | Not readable |
| #05223C text on white | 16.14:1 | AAA | Lc 102.9 | Preferred for body text |
| #05223C 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E0EBF7
oklch(93.5% 0.02 250.4)
-
Step 200
200
#C6DCF3
oklch(88.5% 0.04 249.5)
-
Step 300
300
#9EC5ED
oklch(80.9% 0.071 249.4)
-
Step 400
400
#66A6E5
oklch(70.8% 0.114 249.4)
-
Step 500
500
#358EDD
oklch(63.2% 0.145 249.1)
-
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
#00518C
oklch(42.7% 0.118 249.2)
-
Step 900
900
#0D4471
oklch(37.8% 0.094 248.7)
-
Step 950
950 (this color)
#05223C
oklch(24.6% 0.06 249.3)
#05223C 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) | #16243D | 0.021 |
| Deuteranopia (no green cones) | #0D1E3B | 0.014 |
| Tritanopia (no blue cones) | #00282C | 0.043 |
| Achromatopsia (no color) | #212121 | 0.060 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #05223C
#05223C
oklch(24.6% 0.06 249.3)
- #311B00
#311B00
oklch(24.6% 0.054 68.7)
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 #05223C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.031
- Dark #1B2431 ΔE 0.035
- Rich Black #0D1B2A ΔE 0.038
- Jet #212529 ΔE 0.053
- Navy Blue #001146 ΔE 0.058
- Space Cadet #2B2D42 ΔE 0.067
- Marine #042E60 ΔE 0.073
- Gunmetal #293241 ΔE 0.076
Use #05223C 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.