#18519D
Closest named color: Dusk Blue (#26538D). oklch(44.3% 0.137 257.4), rgb(24, 81, 157).
Aa
White text reads best on this color (7.77:1).
About this color
#18519D is a dark, moderately saturated blue. In OKLCH its lightness is 44%, its chroma 0.137 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.029 away. White text reads best on it, at 7.77:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.137) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.70:1 |
| White text | 7.77:1 |
Values
| HEX | #18519D |
| RGB | rgb(24, 81, 157) |
| HSL | hsl(214, 73%, 35%) |
| OKLCH | oklch(44.3% 0.137 257.4) |
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 #18519D | 7.77:1 | AAA | Lc -91.3 | Preferred for body text |
| Black text on #18519D | 2.70:1 | Fails | Lc 17.5 | Dividers and decoration only |
| #18519D text on white | 7.77:1 | AAA | Lc 86.5 | Fine for body text |
| #18519D text on black | 2.70:1 | Fails | Lc -15.6 | Dividers and decoration only |
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 800.
-
Step 50
50
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E0EBFA
oklch(93.6% 0.024 256.1)
-
Step 200
200
#C7DBF7
oklch(88.5% 0.044 256.8)
-
Step 300
300
#A0C3F4
oklch(80.9% 0.079 256.8)
-
Step 400
400
#6CA2EF
oklch(70.7% 0.127 257.3)
-
Step 500
500
#4288EA
oklch(63% 0.164 257.4)
-
Step 600
600
#1F70D8
oklch(55.7% 0.177 257.1)
-
Step 700
700
#115DBC
oklch(49.2% 0.165 257.3)
-
Step 800
800 (this color)
#18519D
oklch(44.3% 0.137 257.4)
-
Step 900
900
#174079
oklch(37.6% 0.107 257.5)
-
Step 950
950
#0F2647
oklch(27% 0.068 257.7)
#18519D 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) | #2559A0 | 0.026 |
| Deuteranopia (no green cones) | #004D9B | 0.017 |
| Tritanopia (no blue cones) | #00636F | 0.104 |
| Achromatopsia (no color) | #525252 | 0.137 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18519D
#18519D
oklch(44.3% 0.137 257.4)
- #6F4B00
#6F4B00
oklch(44.2% 0.092 77.2)
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 #18519D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.029
- Cobalt #1E488F ΔE 0.032
- Light Navy #155084 ΔE 0.041
- Deep Sea Blue #015482 ΔE 0.049
- Denim Blue #3B5B92 ΔE 0.050
- Light Navy Blue #2E5A88 ΔE 0.051
- Blueberry #464196 ΔE 0.059
- Twilight #4E518B ΔE 0.064
Use #18519D 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.