#05213B
Closest named color: Oxford Blue (#1B263B). oklch(24.3% 0.06 250), rgb(5, 33, 59).
Aa
White text reads best on this color (16.31:1).
About this color
#05213B is a very dark, muted blue. In OKLCH its lightness is 24%, its chroma 0.060 and its hue 250°. 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 16.31:1.
| Hue family | Blues |
| Lightness | very dark (24%) |
| Chroma | muted (0.060) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.28:1 |
| White text | 16.31:1 |
Values
| HEX | #05213B |
| RGB | rgb(5, 33, 59) |
| HSL | hsl(209, 84%, 13%) |
| OKLCH | oklch(24.3% 0.06 250) |
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 #05213B | 16.31:1 | AAA | Lc -105.6 | Preferred for body text |
| Black text on #05213B | 1.28:1 | Fails | Lc 0.0 | Not readable |
| #05213B text on white | 16.31:1 | AAA | Lc 103.1 | Preferred for body text |
| #05213B text on black | 1.28:1 | 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
#67A5E5
oklch(70.6% 0.114 250.4)
-
Step 500
500
#388DDD
oklch(63% 0.145 250.2)
-
Step 600
600
#0076CA
oklch(55.7% 0.156 249.7)
-
Step 700
700
#0063AB
oklch(49.2% 0.138 249.7)
-
Step 800
800
#00518E
oklch(42.8% 0.121 249.9)
-
Step 900
900
#104371
oklch(37.6% 0.094 250.3)
-
Step 950
950 (this color)
#05213B
oklch(24.3% 0.06 250)
#05213B 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) | #15233C | 0.020 |
| Deuteranopia (no green cones) | #0C1E3A | 0.011 |
| Tritanopia (no blue cones) | #00272B | 0.043 |
| Achromatopsia (no color) | #202020 | 0.060 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #05213B
#05213B
oklch(24.3% 0.06 250)
- #301B00
#301B00
oklch(24.4% 0.053 70.1)
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 #05213B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.033
- Rich Black #0D1B2A ΔE 0.035
- Dark #1B2431 ΔE 0.036
- Jet #212529 ΔE 0.054
- Navy Blue #001146 ΔE 0.056
- Space Cadet #2B2D42 ΔE 0.070
- Marine #042E60 ΔE 0.076
- Gunmetal #293241 ΔE 0.079
Use #05213B 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.