#1C2133
Closest named color: Dark (#1B2431). oklch(25.2% 0.035 271.8), rgb(28, 33, 51).
Aa
White text reads best on this color (15.97:1).
About this color
#1C2133 is a dark, muted blue. In OKLCH its lightness is 25%, its chroma 0.035 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Dark (#1B2431), ΔE 0.012 away. White text reads best on it, at 15.97:1.
| Hue family | Blues |
| Lightness | dark (25%) |
| Chroma | muted (0.035) |
| Temperature | cool |
| Nearest name | Dark (#1B2431) |
| Black text | 1.31:1 |
| White text | 15.97:1 |
Values
| HEX | #1C2133 |
| RGB | rgb(28, 33, 51) |
| HSL | hsl(227, 29%, 15%) |
| OKLCH | oklch(25.2% 0.035 271.8) |
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 #1C2133 | 15.97:1 | AAA | Lc -105.5 | Preferred for body text |
| Black text on #1C2133 | 1.31:1 | Fails | Lc 0.0 | Not readable |
| #1C2133 text on white | 15.97:1 | AAA | Lc 102.9 | Preferred for body text |
| #1C2133 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
#F4F5F9
oklch(97.1% 0.005 275)
-
Step 100
100
#E7EAF2
oklch(93.7% 0.011 269.5)
-
Step 200
200
#D3D9E9
oklch(88.6% 0.023 269.4)
-
Step 300
300
#B7C0DC
oklch(81% 0.041 271.4)
-
Step 400
400
#929FCB
oklch(70.8% 0.066 271.8)
-
Step 500
500
#7786BD
oklch(63% 0.085 272.1)
-
Step 600
600
#6070A9
oklch(55.7% 0.091 271.3)
-
Step 700
700
#4F5D91
oklch(49% 0.085 271.5)
-
Step 800
800
#414C76
oklch(42.6% 0.071 271.9)
-
Step 900
900
#37405F
oklch(37.8% 0.055 271.2)
-
Step 950
950 (this color)
#1C2133
oklch(25.2% 0.035 271.8)
#1C2133 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) | #1B2334 | 0.007 |
| Deuteranopia (no green cones) | #192133 | 0.005 |
| Tritanopia (no blue cones) | #152527 | 0.033 |
| Achromatopsia (no color) | #222222 | 0.035 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1C2133
#1C2133
oklch(25.2% 0.035 271.8)
- #28210D
#28210D
oklch(25% 0.035 90.5)
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 #1C2133, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark #1B2431 ΔE 0.012
- Oxford Blue #1B263B ΔE 0.020
- Jet #212529 ΔE 0.029
- Rich Black #0D1B2A ΔE 0.036
- Space Cadet #2B2D42 ΔE 0.053
- Gunmetal #293241 ΔE 0.064
- Navy Blue #001146 ΔE 0.080
- Eggplant #380835 ΔE 0.083
Use #1C2133 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.