#15205C
Closest named color: Midnight Blue (#191970). oklch(27.7% 0.108 269.9), rgb(21, 32, 92).
Aa
White text reads best on this color (15.07:1).
About this color
#15205C is a dark, moderately saturated blue. In OKLCH its lightness is 28%, its chroma 0.108 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Midnight Blue (#191970), ΔE 0.038 away. White text reads best on it, at 15.07:1.
| Hue family | Blues |
| Lightness | dark (28%) |
| Chroma | moderately saturated (0.108) |
| Temperature | cool |
| Nearest name | Midnight Blue (#191970) |
| Black text | 1.39:1 |
| White text | 15.07:1 |
Values
| HEX | #15205C |
| RGB | rgb(21, 32, 92) |
| HSL | hsl(231, 63%, 22%) |
| OKLCH | oklch(27.7% 0.108 269.9) |
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 #15205C | 15.07:1 | AAA | Lc -104.4 | Preferred for body text |
| Black text on #15205C | 1.39:1 | Fails | Lc 0.0 | Not readable |
| #15205C text on white | 15.07:1 | AAA | Lc 101.6 | Preferred for body text |
| #15205C text on black | 1.39:1 | 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
#E2E9FF
oklch(93.5% 0.031 271.7)
-
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
#7C99FF
oklch(70.6% 0.153 270.2)
-
Step 500
500
#5D7CFF
oklch(63.2% 0.197 269.9)
-
Step 600
600
#4259FF
oklch(55.6% 0.245 269.9)
-
Step 700
700
#323AF2
oklch(49.1% 0.263 269.8)
-
Step 800
800
#2933C3
oklch(42.7% 0.217 270)
-
Step 900
900
#23309A
oklch(37.7% 0.171 270.1)
-
Step 950
950 (this color)
#15205C
oklch(27.7% 0.108 269.9)
#15205C 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) | #002A5E | 0.030 |
| Deuteranopia (no green cones) | #00235B | 0.020 |
| Tritanopia (no blue cones) | #002F3A | 0.086 |
| Achromatopsia (no color) | #262626 | 0.108 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #15205C
#15205C
oklch(27.7% 0.108 269.9)
- #332600
#332600
oklch(27.6% 0.056 89.1)
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 #15205C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Midnight Blue #191970 ΔE 0.038
- Marine #042E60 ΔE 0.040
- Dark Indigo #1F0954 ΔE 0.052
- Darkblue #030764 ΔE 0.059
- Dark Royal Blue #02066F ΔE 0.063
- Oxford Blue #1B263B ΔE 0.066
- Prussian Blue #1D3557 ΔE 0.067
- Deep Blue #040273 ΔE 0.068
Use #15205C 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.