#18274E
Closest named color: Oxford Blue (#1B263B). oklch(28.3% 0.074 266), rgb(24, 39, 78).
Aa
White text reads best on this color (14.59:1).
About this color
#18274E is a dark, moderately saturated blue. In OKLCH its lightness is 28%, its chroma 0.074 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.035 away. White text reads best on it, at 14.59:1.
| Hue family | Blues |
| Lightness | dark (28%) |
| Chroma | moderately saturated (0.074) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.43:1 |
| White text | 14.59:1 |
Values
| HEX | #18274E |
| RGB | rgb(24, 39, 78) |
| HSL | hsl(223, 53%, 20%) |
| OKLCH | oklch(28.3% 0.074 266) |
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 #18274E | 14.59:1 | AAA | Lc -104.1 | Preferred for body text |
| Black text on #18274E | 1.43:1 | Fails | Lc 0.0 | Not readable |
| #18274E text on white | 14.59:1 | AAA | Lc 101.2 | Preferred for body text |
| #18274E text on black | 1.43:1 | 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
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E2EAFC
oklch(93.6% 0.026 266.6)
-
Step 200
200
#CAD9FB
oklch(88.5% 0.05 266.5)
-
Step 300
300
#A6C0FA
oklch(80.9% 0.087 265.8)
-
Step 400
400
#779DF8
oklch(70.8% 0.14 265.8)
-
Step 500
500
#5581F5
oklch(63.1% 0.18 265.8)
-
Step 600
600
#3D67E4
oklch(55.6% 0.196 266.1)
-
Step 700
700
#2F55C6
oklch(49.2% 0.182 265.8)
-
Step 800
800
#2746A0
oklch(42.7% 0.151 265.8)
-
Step 900
900
#243C7F
oklch(37.7% 0.117 266.1)
-
Step 950
950 (this color)
#18274E
oklch(28.3% 0.074 266)
#18274E 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) | #142B4F | 0.013 |
| Deuteranopia (no green cones) | #0B264D | 0.015 |
| Tritanopia (no blue cones) | #003036 | 0.064 |
| Achromatopsia (no color) | #292929 | 0.074 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18274E
#18274E
oklch(28.3% 0.074 266)
- #362700
#362700
oklch(28.3% 0.058 86.4)
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 #18274E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.035
- Marine #042E60 ΔE 0.038
- Space Cadet #2B2D42 ΔE 0.044
- Prussian Blue #1D3557 ΔE 0.047
- Dark #1B2431 ΔE 0.053
- Gunmetal #293241 ΔE 0.055
- Marine Blue #01386A ΔE 0.066
- Midnight Green #073B4C ΔE 0.067
Use #18274E 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.