#10244E
Closest named color: Oxford Blue (#1B263B). oklch(27.1% 0.082 263), rgb(16, 36, 78).
Aa
White text reads best on this color (15.16:1).
About this color
#10244E is a dark, moderately saturated blue. In OKLCH its lightness is 27%, its chroma 0.082 and its hue 263°. 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 15.16:1.
| Hue family | Blues |
| Lightness | dark (27%) |
| Chroma | moderately saturated (0.082) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.38:1 |
| White text | 15.16:1 |
Values
| HEX | #10244E |
| RGB | rgb(16, 36, 78) |
| HSL | hsl(221, 66%, 18%) |
| OKLCH | oklch(27.1% 0.082 263) |
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 #10244E | 15.16:1 | AAA | Lc -104.6 | Preferred for body text |
| Black text on #10244E | 1.38:1 | Fails | Lc 0.0 | Not readable |
| #10244E text on white | 15.16:1 | AAA | Lc 101.8 | Preferred for body text |
| #10244E text on black | 1.38:1 | 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
#F1F6FF
oklch(97.2% 0.013 262.4)
-
Step 100
100
#E0EAFD
oklch(93.5% 0.028 263.4)
-
Step 200
200
#C7DAFE
oklch(88.6% 0.054 263.2)
-
Step 300
300
#A0C1FF
oklch(80.9% 0.095 262.7)
-
Step 400
400
#6D9EFF
oklch(70.8% 0.152 262.8)
-
Step 500
500
#4581FF
oklch(63.1% 0.198 262.9)
-
Step 600
600
#2866EE
oklch(55.5% 0.215 262.9)
-
Step 700
700
#1C54D0
oklch(49.2% 0.2 262.9)
-
Step 800
800
#1945A8
oklch(42.6% 0.167 263.1)
-
Step 900
900
#1A3C85
oklch(37.8% 0.129 262.9)
-
Step 950
950 (this color)
#10244E
oklch(27.1% 0.082 263)
#10244E 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) | #0C2950 | 0.015 |
| Deuteranopia (no green cones) | #00234D | 0.016 |
| Tritanopia (no blue cones) | #002E35 | 0.065 |
| Achromatopsia (no color) | #262626 | 0.082 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #10244E
#10244E
oklch(27.1% 0.082 263)
- #342400
#342400
oklch(27.2% 0.056 83.5)
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 #10244E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.039
- Marine #042E60 ΔE 0.041
- Dark #1B2431 ΔE 0.056
- Space Cadet #2B2D42 ΔE 0.058
- Prussian Blue #1D3557 ΔE 0.059
- Navy Blue #001146 ΔE 0.064
- Dark Indigo #1F0954 ΔE 0.065
- Midnight Blue #191970 ΔE 0.067
Use #10244E 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.