#18436D
Closest named color: Twilight Blue (#0A437A). oklch(37.6% 0.086 250.8), rgb(24, 67, 109).
Aa
White text reads best on this color (10.18:1).
About this color
#18436D is a dark, moderately saturated blue. In OKLCH its lightness is 38%, its chroma 0.086 and its hue 251°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.023 away. White text reads best on it, at 10.18:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.086) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.06:1 |
| White text | 10.18:1 |
Values
| HEX | #18436D |
| RGB | rgb(24, 67, 109) |
| HSL | hsl(210, 64%, 26%) |
| OKLCH | oklch(37.6% 0.086 250.8) |
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 #18436D | 10.18:1 | AAA | Lc -97.5 | Preferred for body text |
| Black text on #18436D | 2.06:1 | Fails | Lc 10.6 | Not readable |
| #18436D text on white | 10.18:1 | AAA | Lc 93.3 | Preferred for body text |
| #18436D text on black | 2.06:1 | Fails | Lc -9.1 | 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 900.
-
Step 50
50
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E1EBF6
oklch(93.6% 0.018 250.6)
-
Step 200
200
#C8DBF1
oklch(88.4% 0.037 252.1)
-
Step 300
300
#A2C4EA
oklch(80.9% 0.065 251.5)
-
Step 400
400
#6EA5DF
oklch(70.7% 0.103 250.7)
-
Step 500
500
#458DD6
oklch(63.1% 0.132 251)
-
Step 600
600
#2176C4
oklch(55.7% 0.144 250.9)
-
Step 700
700
#1163A9
oklch(49.2% 0.133 250.6)
-
Step 800
800
#135189
oklch(42.8% 0.111 250.7)
-
Step 900
900 (this color)
#18436D
oklch(37.6% 0.086 250.8)
-
Step 950
950
#102840
oklch(27.1% 0.054 250.5)
#18436D 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) | #30456F | 0.027 |
| Deuteranopia (no green cones) | #233E6C | 0.017 |
| Tritanopia (no blue cones) | #004D52 | 0.065 |
| Achromatopsia (no color) | #414141 | 0.086 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18436D
#18436D
oklch(37.6% 0.086 250.8)
- #5C3800
#5C3800
oklch(37.5% 0.081 70)
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 #18436D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.023
- Dark Grey Blue #29465B ΔE 0.038
- Marine Blue #01386A ΔE 0.039
- Charcoal #264653 ΔE 0.050
- Light Navy #155084 ΔE 0.050
- Prussian Blue #1D3557 ΔE 0.052
- Dark Blue Grey #1F3B4D ΔE 0.056
- Deep Sea Blue #015482 ΔE 0.056
Use #18436D 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.