#1C2148
Closest named color: Oxford Blue (#1B263B). oklch(26.6% 0.072 274.9), rgb(28, 33, 72).
Aa
White text reads best on this color (15.43:1).
About this color
#1C2148 is a dark, moderately saturated blue. In OKLCH its lightness is 27%, its chroma 0.072 and its hue 275°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.032 away. White text reads best on it, at 15.43:1.
| Hue family | Blues |
| Lightness | dark (27%) |
| Chroma | moderately saturated (0.072) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.36:1 |
| White text | 15.43:1 |
Values
| HEX | #1C2148 |
| RGB | rgb(28, 33, 72) |
| HSL | hsl(233, 44%, 20%) |
| OKLCH | oklch(26.6% 0.072 274.9) |
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 #1C2148 | 15.43:1 | AAA | Lc -104.9 | Preferred for body text |
| Black text on #1C2148 | 1.36:1 | Fails | Lc 0.0 | Not readable |
| #1C2148 text on white | 15.43:1 | AAA | Lc 102.2 | Preferred for body text |
| #1C2148 text on black | 1.36:1 | 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
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E5E9FB
oklch(93.6% 0.025 275.9)
-
Step 200
200
#CFD7F9
oklch(88.4% 0.048 274.9)
-
Step 300
300
#B0BDF8
oklch(80.9% 0.085 274.7)
-
Step 400
400
#8898F5
oklch(70.7% 0.137 275)
-
Step 500
500
#6D7CF1
oklch(63.2% 0.174 274.8)
-
Step 600
600
#5761DF
oklch(55.5% 0.189 275)
-
Step 700
700
#484FC2
oklch(49% 0.177 275.1)
-
Step 800
800
#3B429D
oklch(42.8% 0.146 275.1)
-
Step 900
900
#32397D
oklch(37.8% 0.114 275.1)
-
Step 950
950 (this color)
#1C2148
oklch(26.6% 0.072 274.9)
#1C2148 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) | #0E2649 | 0.022 |
| Deuteranopia (no green cones) | #092347 | 0.023 |
| Tritanopia (no blue cones) | #062A31 | 0.064 |
| Achromatopsia (no color) | #242424 | 0.072 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1C2148
#1C2148
oklch(26.6% 0.072 274.9)
- #2E2500
#2E2500
oklch(26.7% 0.055 95.2)
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 #1C2148, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.032
- Dark #1B2431 ΔE 0.047
- Space Cadet #2B2D42 ΔE 0.052
- Marine #042E60 ΔE 0.056
- Dark Indigo #1F0954 ΔE 0.060
- Jet #212529 ΔE 0.064
- Rich Black #0D1B2A ΔE 0.064
- Prussian Blue #1D3557 ΔE 0.065
Use #1C2148 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.