#18225E
Closest named color: Marine (#042E60). oklch(28.5% 0.107 270.8), rgb(24, 34, 94).
Aa
White text reads best on this color (14.69:1).
About this color
#18225E is a dark, moderately saturated blue. In OKLCH its lightness is 29%, its chroma 0.107 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Marine (#042E60), ΔE 0.035 away. White text reads best on it, at 14.69:1.
| Hue family | Blues |
| Lightness | dark (29%) |
| Chroma | moderately saturated (0.107) |
| Temperature | cool |
| Nearest name | Marine (#042E60) |
| Black text | 1.42:1 |
| White text | 14.69:1 |
Values
| HEX | #18225E |
| RGB | rgb(24, 34, 94) |
| HSL | hsl(231, 59%, 23%) |
| OKLCH | oklch(28.5% 0.107 270.8) |
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 #18225E | 14.69:1 | AAA | Lc -104.1 | Preferred for body text |
| Black text on #18225E | 1.42:1 | Fails | Lc 0.0 | Not readable |
| #18225E text on white | 14.69:1 | AAA | Lc 101.2 | Preferred for body text |
| #18225E text on black | 1.42:1 | 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
#CBD8FF
oklch(88.5% 0.056 270.7)
-
Step 300
300
#A9BEFF
oklch(80.9% 0.095 270.4)
-
Step 400
400
#7E99FF
oklch(70.7% 0.152 270.9)
-
Step 500
500
#5F7BFF
oklch(63.1% 0.198 270.7)
-
Step 600
600
#4558FF
oklch(55.6% 0.245 270.7)
-
Step 700
700
#3639F1
oklch(49% 0.262 270.7)
-
Step 800
800
#2C32C3
oklch(42.7% 0.218 270.9)
-
Step 900
900
#253099
oklch(37.7% 0.169 270.8)
-
Step 950
950 (this color)
#18225E
oklch(28.5% 0.107 270.8)
#18225E 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) | #002C60 | 0.031 |
| Deuteranopia (no green cones) | #00255D | 0.023 |
| Tritanopia (no blue cones) | #00313C | 0.087 |
| Achromatopsia (no color) | #282828 | 0.107 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18225E
#18225E
oklch(28.5% 0.107 270.8)
- #352800
#352800
oklch(28.4% 0.058 89.8)
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 #18225E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine #042E60 ΔE 0.035
- Midnight Blue #191970 ΔE 0.037
- Dark Indigo #1F0954 ΔE 0.057
- Prussian Blue #1D3557 ΔE 0.061
- Marine Blue #01386A ΔE 0.064
- Darkblue #030764 ΔE 0.065
- Oxford Blue #1B263B ΔE 0.067
- Dark Royal Blue #02066F ΔE 0.068
Use #18225E 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.