#1C213B
Closest named color: Oxford Blue (#1B263B). oklch(25.7% 0.049 274.2), rgb(28, 33, 59).
Aa
White text reads best on this color (15.78:1).
About this color
#1C213B is a dark, muted blue. In OKLCH its lightness is 26%, its chroma 0.049 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.017 away. White text reads best on it, at 15.78:1.
| Hue family | Blues |
| Lightness | dark (26%) |
| Chroma | muted (0.049) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.33:1 |
| White text | 15.78:1 |
Values
| HEX | #1C213B |
| RGB | rgb(28, 33, 59) |
| HSL | hsl(230, 36%, 17%) |
| OKLCH | oklch(25.7% 0.049 274.2) |
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 #1C213B | 15.78:1 | AAA | Lc -105.3 | Preferred for body text |
| Black text on #1C213B | 1.33:1 | Fails | Lc 0.0 | Not readable |
| #1C213B text on white | 15.78:1 | AAA | Lc 102.7 | Preferred for body text |
| #1C213B text on black | 1.33:1 | 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
#F4F5FB
oklch(97.1% 0.008 278.6)
-
Step 100
100
#E6E9F6
oklch(93.6% 0.018 275.6)
-
Step 200
200
#D2D8EF
oklch(88.5% 0.032 274.1)
-
Step 300
300
#B4BFE7
oklch(81% 0.058 273)
-
Step 400
400
#8E9CDB
oklch(70.6% 0.094 274.1)
-
Step 500
500
#7383D2
oklch(63.1% 0.12 273.8)
-
Step 600
600
#5D6BBF
oklch(55.7% 0.131 274.3)
-
Step 700
700
#4D59A4
oklch(49.1% 0.12 274.3)
-
Step 800
800
#3F4985
oklch(42.7% 0.1 274.3)
-
Step 900
900
#353D6B
oklch(37.6% 0.079 274.5)
-
Step 950
950 (this color)
#1C213B
oklch(25.7% 0.049 274.2)
#1C213B 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) | #17243C | 0.011 |
| Deuteranopia (no green cones) | #15213A | 0.011 |
| Tritanopia (no blue cones) | #11262B | 0.043 |
| Achromatopsia (no color) | #232323 | 0.049 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1C213B
#1C213B
oklch(25.7% 0.049 274.2)
- #2B2302
#2B2302
oklch(25.8% 0.05 95.4)
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 #1C213B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.017
- Dark #1B2431 ΔE 0.024
- Jet #212529 ΔE 0.041
- Rich Black #0D1B2A ΔE 0.045
- Space Cadet #2B2D42 ΔE 0.050
- Gunmetal #293241 ΔE 0.062
- Navy Blue #001146 ΔE 0.072
- Marine #042E60 ΔE 0.074
Use #1C213B 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.