#18314B
Closest named color: Prussian Blue (#1D3557). oklch(30.7% 0.057 251), rgb(24, 49, 75).
Aa
White text reads best on this color (13.29:1).
About this color
#18314B is a dark, muted blue. In OKLCH its lightness is 31%, its chroma 0.057 and its hue 251°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.025 away. White text reads best on it, at 13.29:1.
| Hue family | Blues |
| Lightness | dark (31%) |
| Chroma | muted (0.057) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.57:1 |
| White text | 13.29:1 |
Values
| HEX | #18314B |
| RGB | rgb(24, 49, 75) |
| HSL | hsl(211, 52%, 19%) |
| OKLCH | oklch(30.7% 0.057 251) |
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 #18314B | 13.29:1 | AAA | Lc -102.8 | Preferred for body text |
| Black text on #18314B | 1.57:1 | Fails | Lc 0.0 | Not readable |
| #18314B text on white | 13.29:1 | AAA | Lc 99.5 | Preferred for body text |
| #18314B 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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E1EBF7
oklch(93.6% 0.019 252.9)
-
Step 200
200
#C8DBF2
oklch(88.4% 0.038 253.2)
-
Step 300
300
#A1C4EB
oklch(80.8% 0.067 251.4)
-
Step 400
400
#6CA5E1
oklch(70.7% 0.107 250.7)
-
Step 500
500
#418DD9
oklch(63.1% 0.137 250.9)
-
Step 600
600
#1B75C6
oklch(55.5% 0.149 251.1)
-
Step 700
700
#0962AB
oklch(49% 0.138 250.9)
-
Step 800
800
#0F508B
oklch(42.6% 0.115 251.4)
-
Step 900
900
#16436F
oklch(37.6% 0.09 251.1)
-
Step 950
950 (this color)
#18314B
oklch(30.7% 0.057 251)
#18314B 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 | 0.019 |
| Deuteranopia (no green cones) | #1F2D4A | 0.014 |
| Tritanopia (no blue cones) | #00373A | 0.046 |
| Achromatopsia (no color) | #2F2F2F | 0.057 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18314B
#18314B
oklch(30.7% 0.057 251)
- #412A0A
#412A0A
oklch(30.6% 0.056 71.2)
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 #18314B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.025
- Gunmetal #293241 ΔE 0.029
- Space Cadet #2B2D42 ΔE 0.030
- Midnight Green #073B4C ΔE 0.034
- Dark Blue Grey #1F3B4D ΔE 0.035
- Oxford Blue #1B263B ΔE 0.041
- Marine #042E60 ΔE 0.043
- Marine Blue #01386A ΔE 0.056
Use #18314B 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.