#1C1F48
Closest named color: Oxford Blue (#1B263B). oklch(26.2% 0.075 276.7), rgb(28, 31, 72).
Aa
White text reads best on this color (15.68:1).
About this color
#1C1F48 is a dark, moderately saturated blue. In OKLCH its lightness is 26%, its chroma 0.075 and its hue 277°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.036 away. White text reads best on it, at 15.68:1.
| Hue family | Blues |
| Lightness | dark (26%) |
| Chroma | moderately saturated (0.075) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.33:1 |
| White text | 15.68:1 |
Values
| HEX | #1C1F48 |
| RGB | rgb(28, 31, 72) |
| HSL | hsl(236, 44%, 20%) |
| OKLCH | oklch(26.2% 0.075 276.7) |
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 #1C1F48 | 15.68:1 | AAA | Lc -105.1 | Preferred for body text |
| Black text on #1C1F48 | 1.33:1 | Fails | Lc 0.0 | Not readable |
| #1C1F48 text on white | 15.68:1 | AAA | Lc 102.5 | Preferred for body text |
| #1C1F48 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
#F3F5FE
oklch(97.1% 0.012 276.1)
-
Step 100
100
#E5E9FC
oklch(93.7% 0.026 276.4)
-
Step 200
200
#D0D7FA
oklch(88.5% 0.049 276.4)
-
Step 300
300
#B1BCFA
oklch(80.9% 0.089 276.4)
-
Step 400
400
#8A97F8
oklch(70.8% 0.142 276.4)
-
Step 500
500
#7079F5
oklch(63.1% 0.183 276.7)
-
Step 600
600
#5B5EE4
oklch(55.6% 0.199 276.8)
-
Step 700
700
#4B4DC6
oklch(49.2% 0.184 276.5)
-
Step 800
800
#3D40A0
oklch(42.8% 0.152 276.5)
-
Step 900
900
#33377F
oklch(37.6% 0.12 276.6)
-
Step 950
950 (this color)
#1C1F48
oklch(26.2% 0.075 276.7)
#1C1F48 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) | #0A2549 | 0.026 |
| Deuteranopia (no green cones) | #042147 | 0.029 |
| Tritanopia (no blue cones) | #062830 | 0.065 |
| Achromatopsia (no color) | #232323 | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1C1F48
#1C1F48
oklch(26.2% 0.075 276.7)
- #2C2400
#2C2400
oklch(26.2% 0.054 96.6)
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 #1C1F48, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.036
- Dark #1B2431 ΔE 0.050
- Dark Indigo #1F0954 ΔE 0.054
- Space Cadet #2B2D42 ΔE 0.057
- Marine #042E60 ΔE 0.060
- Navy Blue #001146 ΔE 0.062
- Rich Black #0D1B2A ΔE 0.064
- Jet #212529 ΔE 0.067
Use #1C1F48 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.