#1C1D40
Closest named color: Oxford Blue (#1B263B). oklch(25.1% 0.065 279.4), rgb(28, 29, 64).
Aa
White text reads best on this color (16.16:1).
About this color
#1C1D40 is a dark, muted blue. In OKLCH its lightness is 25%, its chroma 0.065 and its hue 279°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.033 away. White text reads best on it, at 16.16:1.
| Hue family | Blues |
| Lightness | dark (25%) |
| Chroma | muted (0.065) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.29:1 |
| White text | 16.16:1 |
Values
| HEX | #1C1D40 |
| RGB | rgb(28, 29, 64) |
| HSL | hsl(238, 39%, 18%) |
| OKLCH | oklch(25.1% 0.065 279.4) |
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 #1C1D40 | 16.16:1 | AAA | Lc -105.6 | Preferred for body text |
| Black text on #1C1D40 | 1.29:1 | Fails | Lc 0.0 | Not readable |
| #1C1D40 text on white | 16.16:1 | AAA | Lc 103.0 | Preferred for body text |
| #1C1D40 text on black | 1.29:1 | 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
#F4F5FC
oklch(97.1% 0.009 279.7)
-
Step 100
100
#E6E9F9
oklch(93.6% 0.022 277.5)
-
Step 200
200
#D3D7F6
oklch(88.6% 0.043 279.7)
-
Step 300
300
#B6BCF2
oklch(80.9% 0.076 279.6)
-
Step 400
400
#9197EC
oklch(70.6% 0.124 279.6)
-
Step 500
500
#787BE6
oklch(63.1% 0.158 279.6)
-
Step 600
600
#6262D4
oklch(55.6% 0.171 279.3)
-
Step 700
700
#5250B8
oklch(49.1% 0.16 279.6)
-
Step 800
800
#434295
oklch(42.7% 0.133 279.7)
-
Step 900
900
#383976
oklch(37.7% 0.102 279.6)
-
Step 950
950 (this color)
#1C1D40
oklch(25.1% 0.065 279.4)
#1C1D40 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) | #0D2241 | 0.024 |
| Deuteranopia (no green cones) | #0A1F3F | 0.025 |
| Tritanopia (no blue cones) | #0E252B | 0.058 |
| Achromatopsia (no color) | #212121 | 0.065 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1C1D40
#1C1D40
oklch(25.1% 0.065 279.4)
- #282200
#282200
oklch(25.1% 0.052 99.5)
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 #1C1D40, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.033
- Dark #1B2431 ΔE 0.041
- Rich Black #0D1B2A ΔE 0.050
- Jet #212529 ΔE 0.058
- Dark Indigo #1F0954 ΔE 0.059
- Navy Blue #001146 ΔE 0.060
- Space Cadet #2B2D42 ΔE 0.061
- Dark Purple #35063E ΔE 0.071
Use #1C1D40 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.