#10273D
Closest named color: Oxford Blue (#1B263B). oklch(26.6% 0.051 249.3), rgb(16, 39, 61).
Aa
White text reads best on this color (15.22:1).
About this color
#10273D is a dark, muted blue. In OKLCH its lightness is 27%, its chroma 0.051 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.014 away. White text reads best on it, at 15.22:1.
| Hue family | Blues |
| Lightness | dark (27%) |
| Chroma | muted (0.051) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.37:1 |
| White text | 15.22:1 |
Values
| HEX | #10273D |
| RGB | rgb(16, 39, 61) |
| HSL | hsl(209, 58%, 15%) |
| OKLCH | oklch(26.6% 0.051 249.3) |
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 #10273D | 15.22:1 | AAA | Lc -104.8 | Preferred for body text |
| Black text on #10273D | 1.37:1 | Fails | Lc 0.0 | Not readable |
| #10273D text on white | 15.22:1 | AAA | Lc 102.0 | Preferred for body text |
| #10273D text on black | 1.37:1 | 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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E1EBF5
oklch(93.5% 0.017 248)
-
Step 200
200
#C9DBEF
oklch(88.4% 0.034 251)
-
Step 300
300
#A3C4E6
oklch(80.8% 0.06 249.3)
-
Step 400
400
#71A5DA
oklch(70.6% 0.096 249.8)
-
Step 500
500
#488ED0
oklch(63.1% 0.122 249.1)
-
Step 600
600
#2777BD
oklch(55.6% 0.133 249.2)
-
Step 700
700
#1864A3
oklch(49.2% 0.123 249)
-
Step 800
800
#185184
oklch(42.6% 0.103 249.7)
-
Step 900
900
#1B446A
oklch(37.7% 0.08 249.3)
-
Step 950
950 (this color)
#10273D
oklch(26.6% 0.051 249.3)
#10273D 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) | #1D283E | 0.018 |
| Deuteranopia (no green cones) | #17243D | 0.012 |
| Tritanopia (no blue cones) | #002C2F | 0.039 |
| Achromatopsia (no color) | #262626 | 0.051 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #10273D
#10273D
oklch(26.6% 0.051 249.3)
- #352006
#352006
oklch(26.5% 0.05 68.3)
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 #10273D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.014
- Dark #1B2431 ΔE 0.025
- Jet #212529 ΔE 0.041
- Space Cadet #2B2D42 ΔE 0.047
- Rich Black #0D1B2A ΔE 0.051
- Gunmetal #293241 ΔE 0.054
- Marine #042E60 ΔE 0.064
- Prussian Blue #1D3557 ΔE 0.064
Use #10273D 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.