#18487A
Closest named color: Twilight Blue (#0A437A). oklch(39.7% 0.099 252.5), rgb(24, 72, 122).
Aa
White text reads best on this color (9.34:1).
About this color
#18487A is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.099 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.019 away. White text reads best on it, at 9.34:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.099) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.24:1 |
| White text | 9.34:1 |
Values
| HEX | #18487A |
| RGB | rgb(24, 72, 122) |
| HSL | hsl(211, 67%, 29%) |
| OKLCH | oklch(39.7% 0.099 252.5) |
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 #18487A | 9.34:1 | AAA | Lc -95.6 | Preferred for body text |
| Black text on #18487A | 2.24:1 | Fails | Lc 12.7 | Not readable |
| #18487A text on white | 9.34:1 | AAA | Lc 91.2 | Preferred for body text |
| #18487A text on black | 2.24:1 | Fails | Lc -11.1 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E0EBF8
oklch(93.6% 0.021 252.5)
-
Step 200
200
#C6DBF4
oklch(88.4% 0.041 252.8)
-
Step 300
300
#9FC4F0
oklch(80.9% 0.074 253.1)
-
Step 400
400
#68A4E8
oklch(70.6% 0.118 252.6)
-
Step 500
500
#3A8CE2
oklch(63.2% 0.152 252.4)
-
Step 600
600
#0B74D0
oklch(55.7% 0.165 252.5)
-
Step 700
700
#0061B2
oklch(49.2% 0.149 252.5)
-
Step 800
800
#044F91
oklch(42.6% 0.127 252.5)
-
Step 900
900 (this color)
#18487A
oklch(39.7% 0.099 252.5)
-
Step 950
950
#0C2744
oklch(26.9% 0.063 252.6)
#18487A 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) | #304B7C | 0.026 |
| Deuteranopia (no green cones) | #204379 | 0.015 |
| Tritanopia (no blue cones) | #00545B | 0.074 |
| Achromatopsia (no color) | #474747 | 0.099 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18487A
#18487A
oklch(39.7% 0.099 252.5)
- #623E00
#623E00
oklch(39.6% 0.085 72.5)
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 #18487A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.019
- Light Navy #155084 ΔE 0.027
- Deep Sea Blue #015482 ΔE 0.036
- Cobalt #1E488F ΔE 0.036
- Dusk Blue #26538D ΔE 0.046
- Dark Grey Blue #29465B ΔE 0.053
- Marine Blue #01386A ΔE 0.058
- Light Navy Blue #2E5A88 ΔE 0.062
Use #18487A 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.