#0C233A
Closest named color: Oxford Blue (#1B263B). oklch(25.1% 0.053 250.7), rgb(12, 35, 58).
Aa
White text reads best on this color (15.94:1).
About this color
#0C233A is a dark, muted blue. In OKLCH its lightness is 25%, its chroma 0.053 and its hue 251°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.023 away. White text reads best on it, at 15.94:1.
| Hue family | Blues |
| Lightness | dark (25%) |
| Chroma | muted (0.053) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.31:1 |
| White text | 15.94:1 |
Values
| HEX | #0C233A |
| RGB | rgb(12, 35, 58) |
| HSL | hsl(210, 66%, 14%) |
| OKLCH | oklch(25.1% 0.053 250.7) |
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 #0C233A | 15.94:1 | AAA | Lc -105.4 | Preferred for body text |
| Black text on #0C233A | 1.31:1 | Fails | Lc 0.0 | Not readable |
| #0C233A text on white | 15.94:1 | AAA | Lc 102.8 | Preferred for body text |
| #0C233A 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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E1EBF6
oklch(93.6% 0.018 250.6)
-
Step 200
200
#C9DBF0
oklch(88.4% 0.035 252.3)
-
Step 300
300
#A3C4E8
oklch(80.8% 0.062 250.8)
-
Step 400
400
#70A5DD
oklch(70.7% 0.1 250.7)
-
Step 500
500
#488DD3
oklch(63% 0.127 250.8)
-
Step 600
600
#2676C1
oklch(55.6% 0.139 250.8)
-
Step 700
700
#1763A6
oklch(49.1% 0.128 250.4)
-
Step 800
800
#175187
oklch(42.8% 0.107 250.7)
-
Step 900
900
#1B436C
oklch(37.6% 0.084 251.5)
-
Step 950
950 (this color)
#0C233A
oklch(25.1% 0.053 250.7)
#0C233A 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) | #19243B | 0.017 |
| Deuteranopia (no green cones) | #12203A | 0.011 |
| Tritanopia (no blue cones) | #00282B | 0.040 |
| Achromatopsia (no color) | #222222 | 0.053 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0C233A
#0C233A
oklch(25.1% 0.053 250.7)
- #311D01
#311D01
oklch(25.1% 0.052 72.1)
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 #0C233A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.023
- Dark #1B2431 ΔE 0.026
- Rich Black #0D1B2A ΔE 0.037
- Jet #212529 ΔE 0.044
- Space Cadet #2B2D42 ΔE 0.060
- Navy Blue #001146 ΔE 0.066
- Gunmetal #293241 ΔE 0.069
- Marine #042E60 ΔE 0.073
Use #0C233A 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.