#1C1E40
Closest named color: Oxford Blue (#1B263B). oklch(25.3% 0.063 278.3), rgb(28, 30, 64).
Aa
White text reads best on this color (16.04:1).
About this color
#1C1E40 is a dark, muted blue. In OKLCH its lightness is 25%, its chroma 0.063 and its hue 278°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.030 away. White text reads best on it, at 16.04:1.
| Hue family | Blues |
| Lightness | dark (25%) |
| Chroma | muted (0.063) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.30:1 |
| White text | 16.04:1 |
Values
| HEX | #1C1E40 |
| RGB | rgb(28, 30, 64) |
| HSL | hsl(237, 39%, 18%) |
| OKLCH | oklch(25.3% 0.063 278.3) |
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 #1C1E40 | 16.04:1 | AAA | Lc -105.5 | Preferred for body text |
| Black text on #1C1E40 | 1.30:1 | Fails | Lc 0.0 | Not readable |
| #1C1E40 text on white | 16.04:1 | AAA | Lc 102.9 | Preferred for body text |
| #1C1E40 text on black | 1.30:1 | 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
#D2D7F5
oklch(88.5% 0.042 278)
-
Step 300
300
#B5BCF1
oklch(80.8% 0.075 278.7)
-
Step 400
400
#9098EA
oklch(70.6% 0.12 278.6)
-
Step 500
500
#767DE4
oklch(63.2% 0.153 278.1)
-
Step 600
600
#6063D2
oklch(55.5% 0.167 278.3)
-
Step 700
700
#5052B6
oklch(49.2% 0.155 278.2)
-
Step 800
800
#414393
oklch(42.6% 0.129 278.3)
-
Step 900
900
#373A75
oklch(37.8% 0.099 278.3)
-
Step 950
950 (this color)
#1C1E40
oklch(25.3% 0.063 278.3)
#1C1E40 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) | #0F2341 | 0.022 |
| Deuteranopia (no green cones) | #0C203F | 0.023 |
| Tritanopia (no blue cones) | #0E252B | 0.056 |
| Achromatopsia (no color) | #212121 | 0.064 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1C1E40
#1C1E40
oklch(25.3% 0.063 278.3)
- #292200
#292200
oklch(25.2% 0.052 97.8)
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 #1C1E40, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.030
- Dark #1B2431 ΔE 0.039
- Rich Black #0D1B2A ΔE 0.050
- Jet #212529 ΔE 0.056
- Space Cadet #2B2D42 ΔE 0.058
- Dark Indigo #1F0954 ΔE 0.061
- Navy Blue #001146 ΔE 0.062
- Marine #042E60 ΔE 0.072
Use #1C1E40 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.