#18436E
Closest named color: Twilight Blue (#0A437A). oklch(37.6% 0.088 251.3), rgb(24, 67, 110).
Aa
White text reads best on this color (10.16:1).
About this color
#18436E is a dark, moderately saturated blue. In OKLCH its lightness is 38%, its chroma 0.088 and its hue 251°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.021 away. White text reads best on it, at 10.16:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.088) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.06:1 |
| White text | 10.16:1 |
Values
| HEX | #18436E |
| RGB | rgb(24, 67, 110) |
| HSL | hsl(210, 64%, 26%) |
| OKLCH | oklch(37.6% 0.088 251.3) |
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 #18436E | 10.16:1 | AAA | Lc -97.4 | Preferred for body text |
| Black text on #18436E | 2.06:1 | Fails | Lc 10.6 | Not readable |
| #18436E text on white | 10.16:1 | AAA | Lc 93.3 | Preferred for body text |
| #18436E text on black | 2.06:1 | Fails | Lc -9.2 | 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
#E1EBF7
oklch(93.6% 0.019 252.9)
-
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
#6EA5E0
oklch(70.8% 0.105 251.1)
-
Step 500
500
#448DD8
oklch(63.1% 0.135 251.3)
-
Step 600
600
#2075C5
oklch(55.5% 0.147 251.5)
-
Step 700
700
#1162AA
oklch(49.1% 0.136 251.4)
-
Step 800
800
#13508A
oklch(42.6% 0.113 251.7)
-
Step 900
900 (this color)
#18436E
oklch(37.6% 0.088 251.3)
-
Step 950
950
#102841
oklch(27.2% 0.056 251.4)
#18436E 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) | #2F4670 | 0.027 |
| Deuteranopia (no green cones) | #223E6D | 0.016 |
| Tritanopia (no blue cones) | #004D53 | 0.065 |
| Achromatopsia (no color) | #414141 | 0.088 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18436E
#18436E
oklch(37.6% 0.088 251.3)
- #5C3900
#5C3900
oklch(37.7% 0.081 71.3)
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 #18436E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.021
- Marine Blue #01386A ΔE 0.039
- Dark Grey Blue #29465B ΔE 0.039
- Light Navy #155084 ΔE 0.049
- Charcoal #264653 ΔE 0.051
- Prussian Blue #1D3557 ΔE 0.053
- Deep Sea Blue #015482 ΔE 0.055
- Cobalt #1E488F ΔE 0.057
Use #18436E 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.