#10213D
Closest named color: Oxford Blue (#1B263B). oklch(25% 0.058 259.9), rgb(16, 33, 61).
Aa
White text reads best on this color (16.06:1).
About this color
#10213D is a very dark, muted blue. In OKLCH its lightness is 25%, its chroma 0.058 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.025 away. White text reads best on it, at 16.06:1.
| Hue family | Blues |
| Lightness | very dark (25%) |
| Chroma | muted (0.058) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.30:1 |
| White text | 16.06:1 |
Values
| HEX | #10213D |
| RGB | rgb(16, 33, 61) |
| HSL | hsl(217, 58%, 15%) |
| OKLCH | oklch(25% 0.058 259.9) |
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 #10213D | 16.06:1 | AAA | Lc -105.5 | Preferred for body text |
| Black text on #10213D | 1.30:1 | Fails | Lc 0.0 | Not readable |
| #10213D text on white | 16.06:1 | AAA | Lc 102.9 | Preferred for body text |
| #10213D 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E2EAF8
oklch(93.5% 0.021 261.8)
-
Step 200
200
#CBDAF3
oklch(88.5% 0.038 260.7)
-
Step 300
300
#A7C2EE
oklch(80.9% 0.069 260.1)
-
Step 400
400
#78A1E5
oklch(70.7% 0.11 260.2)
-
Step 500
500
#5488DD
oklch(63% 0.14 259.8)
-
Step 600
600
#3970CB
oklch(55.5% 0.153 259.9)
-
Step 700
700
#2B5DB0
oklch(49% 0.143 260)
-
Step 800
800
#254D8E
oklch(42.8% 0.117 259.7)
-
Step 900
900
#234072
oklch(37.6% 0.093 260.6)
-
Step 950
950 (this color)
#10213D
oklch(25% 0.058 259.9)
#10213D 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) | #14233E | 0.009 |
| Deuteranopia (no green cones) | #0E1F3C | 0.008 |
| Tritanopia (no blue cones) | #00272C | 0.046 |
| Achromatopsia (no color) | #212121 | 0.058 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #10213D
#10213D
oklch(25% 0.058 259.9)
- #2E1E00
#2E1E00
oklch(24.9% 0.051 80.2)
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 #10213D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.025
- Dark #1B2431 ΔE 0.031
- Rich Black #0D1B2A ΔE 0.040
- Jet #212529 ΔE 0.050
- Navy Blue #001146 ΔE 0.059
- Space Cadet #2B2D42 ΔE 0.061
- Marine #042E60 ΔE 0.071
- Gunmetal #293241 ΔE 0.072
Use #10213D 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.