#15204E
Closest named color: Oxford Blue (#1B263B). oklch(26.4% 0.086 269.5), rgb(21, 32, 78).
Aa
White text reads best on this color (15.57:1).
About this color
#15204E is a dark, moderately saturated blue. In OKLCH its lightness is 26%, its chroma 0.086 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.044 away. White text reads best on it, at 15.57:1.
| Hue family | Blues |
| Lightness | dark (26%) |
| Chroma | moderately saturated (0.086) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.34:1 |
| White text | 15.57:1 |
Values
| HEX | #15204E |
| RGB | rgb(21, 32, 78) |
| HSL | hsl(228, 58%, 19%) |
| OKLCH | oklch(26.4% 0.086 269.5) |
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 #15204E | 15.57:1 | AAA | Lc -105.0 | Preferred for body text |
| Black text on #15204E | 1.34:1 | Fails | Lc 0.0 | Not readable |
| #15204E text on white | 15.57:1 | AAA | Lc 102.3 | Preferred for body text |
| #15204E text on black | 1.34:1 | 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
#F2F5FF
oklch(97.1% 0.014 272.7)
-
Step 100
100
#E2EAFE
oklch(93.7% 0.028 268.4)
-
Step 200
200
#CAD8FF
oklch(88.4% 0.056 269.7)
-
Step 300
300
#A8BEFF
oklch(80.9% 0.096 269.8)
-
Step 400
400
#7B9AFF
oklch(70.8% 0.152 269.4)
-
Step 500
500
#5C7CFF
oklch(63.1% 0.197 269.6)
-
Step 600
600
#435EF5
oklch(55.6% 0.226 269.5)
-
Step 700
700
#364CD5
oklch(49.1% 0.21 269.6)
-
Step 800
800
#2C40AC
oklch(42.8% 0.173 269.4)
-
Step 900
900
#263888
oklch(37.7% 0.135 269.3)
-
Step 950
950 (this color)
#15204E
oklch(26.4% 0.086 269.5)
#15204E 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) | #022650 | 0.023 |
| Deuteranopia (no green cones) | #00214D | 0.022 |
| Tritanopia (no blue cones) | #002B33 | 0.071 |
| Achromatopsia (no color) | #242424 | 0.086 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #15204E
#15204E
oklch(26.4% 0.086 269.5)
- #2F2300
#2F2300
oklch(26.3% 0.054 89.5)
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 #15204E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.044
- Marine #042E60 ΔE 0.050
- Dark Indigo #1F0954 ΔE 0.053
- Navy Blue #001146 ΔE 0.057
- Dark #1B2431 ΔE 0.059
- Midnight Blue #191970 ΔE 0.063
- Space Cadet #2B2D42 ΔE 0.064
- Prussian Blue #1D3557 ΔE 0.068
Use #15204E 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.