#12203B
Closest named color: Oxford Blue (#1B263B). oklch(24.7% 0.055 262.4), rgb(18, 32, 59).
Aa
White text reads best on this color (16.21:1).
About this color
#12203B is a very dark, muted blue. In OKLCH its lightness is 25%, its chroma 0.055 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.026 away. White text reads best on it, at 16.21:1.
| Hue family | Blues |
| Lightness | very dark (25%) |
| Chroma | muted (0.055) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.29:1 |
| White text | 16.21:1 |
Values
| HEX | #12203B |
| RGB | rgb(18, 32, 59) |
| HSL | hsl(220, 53%, 15%) |
| OKLCH | oklch(24.7% 0.055 262.4) |
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 #12203B | 16.21:1 | AAA | Lc -105.6 | Preferred for body text |
| Black text on #12203B | 1.29:1 | Fails | Lc 0.0 | Not readable |
| #12203B text on white | 16.21:1 | AAA | Lc 103.1 | Preferred for body text |
| #12203B text on black | 1.29:1 | 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
#E3EAF7
oklch(93.6% 0.019 263)
-
Step 200
200
#CCDAF2
oklch(88.5% 0.036 261.3)
-
Step 300
300
#AAC1EC
oklch(80.8% 0.066 262.8)
-
Step 400
400
#7DA0E2
oklch(70.6% 0.105 262.6)
-
Step 500
500
#5C87DA
oklch(63% 0.134 262.5)
-
Step 600
600
#436FC7
oklch(55.5% 0.145 262.6)
-
Step 700
700
#355DAC
oklch(49.1% 0.134 262.4)
-
Step 800
800
#2C4C8B
oklch(42.6% 0.111 262.4)
-
Step 900
900
#27406F
oklch(37.6% 0.087 261.9)
-
Step 950
950 (this color)
#12203B
oklch(24.7% 0.055 262.4)
#12203B 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) | #14223C | 0.008 |
| Deuteranopia (no green cones) | #0F1F3A | 0.006 |
| Tritanopia (no blue cones) | #00262A | 0.048 |
| Achromatopsia (no color) | #202020 | 0.055 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #12203B
#12203B
oklch(24.7% 0.055 262.4)
- #2D1E00
#2D1E00
oklch(24.7% 0.051 81.9)
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 #12203B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.026
- Dark #1B2431 ΔE 0.030
- Rich Black #0D1B2A ΔE 0.036
- Jet #212529 ΔE 0.049
- Navy Blue #001146 ΔE 0.059
- Space Cadet #2B2D42 ΔE 0.062
- Gunmetal #293241 ΔE 0.073
- Dark Indigo #1F0954 ΔE 0.075
Use #12203B 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.