#15314B
Closest named color: Prussian Blue (#1D3557). oklch(30.5% 0.058 248.7), rgb(21, 49, 75).
Aa
White text reads best on this color (13.35:1).
About this color
#15314B is a dark, muted blue. In OKLCH its lightness is 31%, its chroma 0.058 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.026 away. White text reads best on it, at 13.35:1.
| Hue family | Blues |
| Lightness | dark (31%) |
| Chroma | muted (0.058) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.57:1 |
| White text | 13.35:1 |
Values
| HEX | #15314B |
| RGB | rgb(21, 49, 75) |
| HSL | hsl(209, 56%, 19%) |
| OKLCH | oklch(30.5% 0.058 248.7) |
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 #15314B | 13.35:1 | AAA | Lc -102.8 | Preferred for body text |
| Black text on #15314B | 1.57:1 | Fails | Lc 0.0 | Not readable |
| #15314B text on white | 13.35:1 | AAA | Lc 99.6 | Preferred for body text |
| #15314B text on black | 1.57:1 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E0EBF7
oklch(93.5% 0.02 250.4)
-
Step 200
200
#C6DCF2
oklch(88.5% 0.038 248.3)
-
Step 300
300
#9EC5EC
oklch(80.9% 0.069 248.7)
-
Step 400
400
#67A6E2
oklch(70.7% 0.11 248.5)
-
Step 500
500
#388EDA
oklch(63.1% 0.141 248.8)
-
Step 600
600
#0077C7
oklch(55.7% 0.152 248.5)
-
Step 700
700
#0063A9
oklch(49% 0.136 249.1)
-
Step 800
800
#00518B
oklch(42.6% 0.117 248.8)
-
Step 900
900
#0F4470
oklch(37.8% 0.092 248.7)
-
Step 950
950 (this color)
#15314B
oklch(30.5% 0.058 248.7)
#15314B 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) | #26324C | 0.022 |
| Deuteranopia (no green cones) | #1E2D4A | 0.015 |
| Tritanopia (no blue cones) | #00373A | 0.045 |
| Achromatopsia (no color) | #2F2F2F | 0.058 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #15314B
#15314B
oklch(30.5% 0.058 248.7)
- #422909
#422909
oklch(30.5% 0.058 68.5)
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 #15314B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.026
- Gunmetal #293241 ΔE 0.031
- Space Cadet #2B2D42 ΔE 0.032
- Midnight Green #073B4C ΔE 0.033
- Dark Blue Grey #1F3B4D ΔE 0.037
- Oxford Blue #1B263B ΔE 0.041
- Marine #042E60 ΔE 0.042
- Marine Blue #01386A ΔE 0.055
Use #15314B 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.