#18274C
Closest named color: Oxford Blue (#1B263B). oklch(28.1% 0.071 265.5), rgb(24, 39, 76).
Aa
White text reads best on this color (14.65:1).
About this color
#18274C is a dark, moderately saturated blue. In OKLCH its lightness is 28%, its chroma 0.071 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.031 away. White text reads best on it, at 14.65:1.
| Hue family | Blues |
| Lightness | dark (28%) |
| Chroma | moderately saturated (0.071) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.43:1 |
| White text | 14.65:1 |
Values
| HEX | #18274C |
| RGB | rgb(24, 39, 76) |
| HSL | hsl(223, 52%, 20%) |
| OKLCH | oklch(28.1% 0.071 265.5) |
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 #18274C | 14.65:1 | AAA | Lc -104.2 | Preferred for body text |
| Black text on #18274C | 1.43:1 | Fails | Lc 0.0 | Not readable |
| #18274C text on white | 14.65:1 | AAA | Lc 101.3 | Preferred for body text |
| #18274C 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
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E2EAFB
oklch(93.6% 0.025 265.6)
-
Step 200
200
#CAD9F9
oklch(88.4% 0.047 265.5)
-
Step 300
300
#A7C0F8
oklch(80.9% 0.084 265.9)
-
Step 400
400
#789DF5
oklch(70.6% 0.136 265.8)
-
Step 500
500
#5682F0
oklch(63% 0.172 265.4)
-
Step 600
600
#3D69DF
oklch(55.7% 0.187 265.3)
-
Step 700
700
#3056C2
oklch(49.1% 0.175 265.6)
-
Step 800
800
#28479D
oklch(42.7% 0.145 265.6)
-
Step 900
900
#243D7C
oklch(37.7% 0.111 265.2)
-
Step 950
950 (this color)
#18274C
oklch(28.1% 0.071 265.5)
#18274C 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) | #162B4D | 0.012 |
| Deuteranopia (no green cones) | #0E264B | 0.013 |
| Tritanopia (no blue cones) | #002F35 | 0.061 |
| Achromatopsia (no color) | #282828 | 0.071 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18274C
#18274C
oklch(28.1% 0.071 265.5)
- #362600
#362600
oklch(28% 0.057 84.4)
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 #18274C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.031
- Marine #042E60 ΔE 0.040
- Space Cadet #2B2D42 ΔE 0.043
- Prussian Blue #1D3557 ΔE 0.047
- Dark #1B2431 ΔE 0.050
- Gunmetal #293241 ΔE 0.054
- Jet #212529 ΔE 0.065
- Midnight Green #073B4C ΔE 0.066
Use #18274C 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.