#15436E
Closest named color: Twilight Blue (#0A437A). oklch(37.5% 0.089 250.3), rgb(21, 67, 110).
Aa
White text reads best on this color (10.19:1).
About this color
#15436E is a dark, moderately saturated blue. In OKLCH its lightness is 38%, its chroma 0.089 and its hue 250°. 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 10.19:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.089) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.05:1 |
| White text | 10.19:1 |
Values
| HEX | #15436E |
| RGB | rgb(21, 67, 110) |
| HSL | hsl(209, 68%, 26%) |
| OKLCH | oklch(37.5% 0.089 250.3) |
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 #15436E | 10.19:1 | AAA | Lc -97.4 | Preferred for body text |
| Black text on #15436E | 2.05:1 | Fails | Lc 10.6 | Not readable |
| #15436E text on white | 10.19:1 | AAA | Lc 93.3 | Preferred for body text |
| #15436E text on black | 2.05:1 | 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
#C7DCF1
oklch(88.5% 0.037 248.2)
-
Step 300
300
#A1C5EB
oklch(81% 0.066 250)
-
Step 400
400
#6CA5E1
oklch(70.7% 0.107 250.7)
-
Step 500
500
#408DD8
oklch(63% 0.136 250.4)
-
Step 600
600
#1876C6
oklch(55.7% 0.148 250.3)
-
Step 700
700
#0563AB
oklch(49.2% 0.138 250.1)
-
Step 800
800
#0D518A
oklch(42.7% 0.113 250)
-
Step 900
900 (this color)
#15436E
oklch(37.5% 0.089 250.3)
-
Step 950
950
#0E2841
oklch(27.1% 0.057 249.9)
#15436E 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 | 0.029 |
| Deuteranopia (no green cones) | #213D6D | 0.019 |
| Tritanopia (no blue cones) | #004D53 | 0.065 |
| Achromatopsia (no color) | #414141 | 0.089 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #15436E
#15436E
oklch(37.5% 0.089 250.3)
- #5C3800
#5C3800
oklch(37.5% 0.081 70)
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 #15436E, 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 0.038
- Dark Grey Blue #29465B ΔE 0.040
- Light Navy #155084 ΔE 0.050
- Charcoal #264653 ΔE 0.052
- Prussian Blue #1D3557 ΔE 0.053
- Deep Sea Blue #015482 ΔE 0.056
- Cobalt #1E488F ΔE 0.057
Use #15436E 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.