#18529B
Closest named color: Dusk Blue (#26538D). oklch(44.4% 0.133 256.5), rgb(24, 82, 155).
Aa
White text reads best on this color (7.72:1).
About this color
#18529B is a dark, moderately saturated blue. In OKLCH its lightness is 44%, its chroma 0.133 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.025 away. White text reads best on it, at 7.72:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.133) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.71:1 |
| White text | 7.72:1 |
Values
| HEX | #18529B |
| RGB | rgb(24, 82, 155) |
| HSL | hsl(213, 73%, 35%) |
| OKLCH | oklch(44.4% 0.133 256.5) |
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 #18529B | 7.72:1 | AAA | Lc -91.1 | Preferred for body text |
| Black text on #18529B | 2.71:1 | Fails | Lc 17.7 | Dividers and decoration only |
| #18529B text on white | 7.72:1 | AAA | Lc 86.4 | Fine for body text |
| #18529B text on black | 2.71:1 | Fails | Lc -15.7 | 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
#E0EBF9
oklch(93.6% 0.022 254.4)
-
Step 200
200
#C7DBF6
oklch(88.5% 0.043 255.9)
-
Step 300
300
#A0C3F3
oklch(80.9% 0.078 256.4)
-
Step 400
400
#6CA2ED
oklch(70.6% 0.125 256.8)
-
Step 500
500
#4289E7
oklch(63.1% 0.159 256.4)
-
Step 600
600
#1F71D5
oklch(55.7% 0.172 256.3)
-
Step 700
700
#105EB9
oklch(49.2% 0.16 256.4)
-
Step 800
800 (this color)
#18529B
oklch(44.4% 0.133 256.5)
-
Step 900
900
#174177
oklch(37.7% 0.103 256.3)
-
Step 950
950
#0F2646
oklch(26.9% 0.066 257.2)
#18529B 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) | #2A599E | 0.026 |
| Deuteranopia (no green cones) | #044D9A | 0.018 |
| Tritanopia (no blue cones) | #00646F | 0.101 |
| Achromatopsia (no color) | #535353 | 0.133 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18529B
#18529B
oklch(44.4% 0.133 256.5)
- #704B00
#704B00
oklch(44.3% 0.093 76.4)
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 #18529B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.025
- Cobalt #1E488F ΔE 0.032
- Light Navy #155084 ΔE 0.038
- Deep Sea Blue #015482 ΔE 0.045
- Light Navy Blue #2E5A88 ΔE 0.046
- Denim Blue #3B5B92 ΔE 0.047
- Blueberry #464196 ΔE 0.061
- Twilight #4E518B ΔE 0.062
Use #18529B 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.