#18436A
Closest named color: Twilight Blue (#0A437A). oklch(37.4% 0.082 249.1), rgb(24, 67, 106).
Aa
White text reads best on this color (10.24:1).
About this color
#18436A is a dark, moderately saturated blue. In OKLCH its lightness is 37%, its chroma 0.082 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.028 away. White text reads best on it, at 10.24:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.082) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.04:1 |
| White text | 10.24:1 |
Values
| HEX | #18436A |
| RGB | rgb(24, 67, 106) |
| HSL | hsl(209, 63%, 25%) |
| OKLCH | oklch(37.4% 0.082 249.1) |
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 #18436A | 10.24:1 | AAA | Lc -97.6 | Preferred for body text |
| Black text on #18436A | 2.04:1 | Fails | Lc 10.4 | Not readable |
| #18436A text on white | 10.24:1 | AAA | Lc 93.5 | Preferred for body text |
| #18436A text on black | 2.04:1 | Fails | Lc -9.0 | 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 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
#C8DCEF
oklch(88.5% 0.034 246.8)
-
Step 300
300
#A2C5E7
oklch(80.9% 0.061 247.8)
-
Step 400
400
#6FA5DC
oklch(70.6% 0.099 249.8)
-
Step 500
500
#468ED2
oklch(63.1% 0.126 249.3)
-
Step 600
600
#2277BF
oklch(55.6% 0.136 249)
-
Step 700
700
#1264A5
oklch(49.2% 0.127 248.9)
-
Step 800
800
#145186
oklch(42.6% 0.106 249.7)
-
Step 900
900 (this color)
#18436A
oklch(37.4% 0.082 249.1)
-
Step 950
950
#10283F
oklch(27% 0.053 249.5)
#18436A 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) | #31456C | 0.028 |
| Deuteranopia (no green cones) | #253D69 | 0.020 |
| Tritanopia (no blue cones) | #004C51 | 0.061 |
| Achromatopsia (no color) | #414141 | 0.082 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18436A
#18436A
oklch(37.4% 0.082 249.1)
- #5C3700
#5C3700
oklch(37.3% 0.082 68.7)
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 #18436A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.028
- Dark Grey Blue #29465B ΔE 0.034
- Marine Blue #01386A ΔE 0.040
- Charcoal #264653 ΔE 0.045
- Prussian Blue #1D3557 ΔE 0.049
- Dark Blue Grey #1F3B4D ΔE 0.051
- Light Navy #155084 ΔE 0.054
- Midnight Green #073B4C ΔE 0.058
Use #18436A 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.