#15315C
Closest named color: Marine (#042E60). oklch(31.7% 0.084 258.8), rgb(21, 49, 92).
Aa
White text reads best on this color (12.91:1).
About this color
#15315C is a dark, moderately saturated blue. In OKLCH its lightness is 32%, its chroma 0.084 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Marine (#042E60), ΔE 0.019 away. White text reads best on it, at 12.91:1.
| Hue family | Blues |
| Lightness | dark (32%) |
| Chroma | moderately saturated (0.084) |
| Temperature | cool |
| Nearest name | Marine (#042E60) |
| Black text | 1.62:1 |
| White text | 12.91:1 |
Values
| HEX | #15315C |
| RGB | rgb(21, 49, 92) |
| HSL | hsl(216, 63%, 22%) |
| OKLCH | oklch(31.7% 0.084 258.8) |
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 #15315C | 12.91:1 | AAA | Lc -102.2 | Preferred for body text |
| Black text on #15315C | 1.62:1 | Fails | Lc 0.0 | Not readable |
| #15315C text on white | 12.91:1 | AAA | Lc 98.9 | Preferred for body text |
| #15315C text on black | 1.62:1 | 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
#F0F6FF
oklch(97.1% 0.014 258.3)
-
Step 100
100
#DFEBFE
oklch(93.7% 0.029 259.6)
-
Step 200
200
#C3DBFE
oklch(88.5% 0.055 257.7)
-
Step 300
300
#9BC2FF
oklch(80.8% 0.097 259.2)
-
Step 400
400
#63A0FF
oklch(70.7% 0.154 259)
-
Step 500
500
#3284FF
oklch(63.1% 0.199 258.9)
-
Step 600
600
#006AED
oklch(55.6% 0.214 258.9)
-
Step 700
700
#0059C9
oklch(49.2% 0.189 258.8)
-
Step 800
800
#0048A6
oklch(42.6% 0.164 258.9)
-
Step 900
900
#0A3D86
oklch(37.6% 0.133 258.9)
-
Step 950
950 (this color)
#15315C
oklch(31.7% 0.084 258.8)
#15315C 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) | #1C355E | 0.016 |
| Deuteranopia (no green cones) | #0F2E5B | 0.012 |
| Tritanopia (no blue cones) | #003B42 | 0.066 |
| Achromatopsia (no color) | #313131 | 0.084 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #15315C
#15315C
oklch(31.7% 0.084 258.8)
- #442D00
#442D00
oklch(31.7% 0.066 78.2)
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 #15315C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine #042E60 ΔE 0.019
- Prussian Blue #1D3557 ΔE 0.020
- Marine Blue #01386A ΔE 0.030
- Dark Blue Grey #1F3B4D ΔE 0.049
- Midnight Green #073B4C ΔE 0.049
- Space Cadet #2B2D42 ΔE 0.052
- Gunmetal #293241 ΔE 0.054
- Oxford Blue #1B263B ΔE 0.064
Use #15315C 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.