#10274D
Closest named color: Oxford Blue (#1B263B). oklch(27.8% 0.076 259.9), rgb(16, 39, 77).
Aa
White text reads best on this color (14.79:1).
About this color
#10274D is a dark, moderately saturated blue. In OKLCH its lightness is 28%, its chroma 0.076 and its hue 260°. 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 14.79:1.
| Hue family | Blues |
| Lightness | dark (28%) |
| Chroma | moderately saturated (0.076) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.41:1 |
| White text | 14.79:1 |
Values
| HEX | #10274D |
| RGB | rgb(16, 39, 77) |
| HSL | hsl(217, 66%, 18%) |
| OKLCH | oklch(27.8% 0.076 259.9) |
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 #10274D | 14.79:1 | AAA | Lc -104.3 | Preferred for body text |
| Black text on #10274D | 1.41:1 | Fails | Lc 0.0 | Not readable |
| #10274D text on white | 14.79:1 | AAA | Lc 101.4 | Preferred for body text |
| #10274D text on black | 1.41:1 | 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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E0EBFC
oklch(93.7% 0.026 259)
-
Step 200
200
#C6DAFB
oklch(88.4% 0.051 260.4)
-
Step 300
300
#9FC2FB
oklch(80.9% 0.09 260)
-
Step 400
400
#6AA0F9
oklch(70.7% 0.143 259.9)
-
Step 500
500
#4085F6
oklch(63.1% 0.183 259.8)
-
Step 600
600
#1E6BE5
oklch(55.6% 0.2 259.9)
-
Step 700
700
#1058C7
oklch(49% 0.186 260)
-
Step 800
800
#1149A1
oklch(42.7% 0.154 259.8)
-
Step 900
900
#163E80
oklch(37.7% 0.12 260)
-
Step 950
950 (this color)
#10274D
oklch(27.8% 0.076 259.9)
#10274D 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) | #142B4E | 0.014 |
| Deuteranopia (no green cones) | #08254C | 0.011 |
| Tritanopia (no blue cones) | #003036 | 0.060 |
| Achromatopsia (no color) | #282828 | 0.076 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #10274D
#10274D
oklch(27.8% 0.076 259.9)
- #372400
#372400
oklch(27.7% 0.057 79)
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 #10274D, 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 0.050
- Prussian Blue #1D3557 ΔE 0.051
- Dark #1B2431 ΔE 0.052
- Gunmetal #293241 ΔE 0.060
- Midnight Green #073B4C ΔE 0.067
- Marine Blue #01386A ΔE 0.068
Use #10274D 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.