#1A1C43
Closest named color: Oxford Blue (#1B263B). oklch(24.9% 0.072 277.6), rgb(26, 28, 67).
Aa
White text reads best on this color (16.26:1).
About this color
#1A1C43 is a very dark, moderately saturated blue. In OKLCH its lightness is 25%, its chroma 0.072 and its hue 278°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.039 away. White text reads best on it, at 16.26:1.
| Hue family | Blues |
| Lightness | very dark (25%) |
| Chroma | moderately saturated (0.072) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.29:1 |
| White text | 16.26:1 |
Values
| HEX | #1A1C43 |
| RGB | rgb(26, 28, 67) |
| HSL | hsl(237, 44%, 18%) |
| OKLCH | oklch(24.9% 0.072 277.6) |
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 #1A1C43 | 16.26:1 | AAA | Lc -105.6 | Preferred for body text |
| Black text on #1A1C43 | 1.29:1 | Fails | Lc 0.0 | Not readable |
| #1A1C43 text on white | 16.26:1 | AAA | Lc 103.1 | Preferred for body text |
| #1A1C43 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
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E5E9FB
oklch(93.6% 0.025 275.9)
-
Step 200
200
#D1D7F9
oklch(88.5% 0.047 277.5)
-
Step 300
300
#B3BCF8
oklch(80.9% 0.085 277.7)
-
Step 400
400
#8D97F5
oklch(70.8% 0.137 277.7)
-
Step 500
500
#737AF0
oklch(63.2% 0.174 277.6)
-
Step 600
600
#5D5FDF
oklch(55.6% 0.191 277.5)
-
Step 700
700
#4D4EC2
oklch(49.2% 0.177 277.3)
-
Step 800
800
#3F409D
oklch(42.7% 0.148 277.7)
-
Step 900
900
#35387C
oklch(37.7% 0.113 277.6)
-
Step 950
950 (this color)
#1A1C43
oklch(24.9% 0.072 277.6)
#1A1C43 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) | #082244 | 0.027 |
| Deuteranopia (no green cones) | #031F42 | 0.029 |
| Tritanopia (no blue cones) | #07252C | 0.063 |
| Achromatopsia (no color) | #202020 | 0.072 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1A1C43
#1A1C43
oklch(24.9% 0.072 277.6)
- #282100
#282100
oklch(24.8% 0.051 97.5)
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 #1A1C43, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.039
- Dark #1B2431 ΔE 0.048
- Dark Indigo #1F0954 ΔE 0.052
- Rich Black #0D1B2A ΔE 0.053
- Navy Blue #001146 ΔE 0.054
- Jet #212529 ΔE 0.065
- Space Cadet #2B2D42 ΔE 0.066
- Marine #042E60 ΔE 0.071
Use #1A1C43 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.