#1C233D
Closest named color: Oxford Blue (#1B263B). oklch(26.3% 0.05 271.2), rgb(28, 35, 61).
Aa
White text reads best on this color (15.47:1).
About this color
#1C233D is a dark, muted blue. In OKLCH its lightness is 26%, its chroma 0.050 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.012 away. White text reads best on it, at 15.47:1.
| Hue family | Blues |
| Lightness | dark (26%) |
| Chroma | muted (0.050) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.35:1 |
| White text | 15.47:1 |
Values
| HEX | #1C233D |
| RGB | rgb(28, 35, 61) |
| HSL | hsl(227, 37%, 17%) |
| OKLCH | oklch(26.3% 0.05 271.2) |
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 #1C233D | 15.47:1 | AAA | Lc -105.0 | Preferred for body text |
| Black text on #1C233D | 1.35:1 | Fails | Lc 0.0 | Not readable |
| #1C233D text on white | 15.47:1 | AAA | Lc 102.3 | Preferred for body text |
| #1C233D text on black | 1.35:1 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E5E9F6
oklch(93.5% 0.018 272.3)
-
Step 200
200
#D1D8F0
oklch(88.4% 0.034 272.8)
-
Step 300
300
#B2BFE8
oklch(80.8% 0.06 271.2)
-
Step 400
400
#8B9DDC
oklch(70.6% 0.095 271.6)
-
Step 500
500
#6F84D2
oklch(63.1% 0.12 271.2)
-
Step 600
600
#586CBF
oklch(55.5% 0.131 271.4)
-
Step 700
700
#485AA5
oklch(49.1% 0.122 271.2)
-
Step 800
800
#3B4A86
oklch(42.7% 0.101 271)
-
Step 900
900
#323E6B
oklch(37.6% 0.079 270.9)
-
Step 950
950 (this color)
#1C233D
oklch(26.3% 0.05 271.2)
#1C233D 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) | #19263E | 0.010 |
| Deuteranopia (no green cones) | #16233C | 0.009 |
| Tritanopia (no blue cones) | #0F282D | 0.043 |
| Achromatopsia (no color) | #242424 | 0.050 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1C233D
#1C233D
oklch(26.3% 0.05 271.2)
- #2E2403
#2E2403
oklch(26.5% 0.05 91.8)
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 #1C233D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.012
- Dark #1B2431 ΔE 0.024
- Jet #212529 ΔE 0.041
- Space Cadet #2B2D42 ΔE 0.044
- Rich Black #0D1B2A ΔE 0.050
- Gunmetal #293241 ΔE 0.056
- Prussian Blue #1D3557 ΔE 0.068
- Marine #042E60 ΔE 0.068
Use #1C233D 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.