#10436B
Closest named color: Twilight Blue (#0A437A). oklch(37.2% 0.086 247.1), rgb(16, 67, 107).
Aa
White text reads best on this color (10.30:1).
About this color
#10436B is a dark, moderately saturated blue. In OKLCH its lightness is 37%, its chroma 0.086 and its hue 247°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.026 away. White text reads best on it, at 10.30:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.086) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.03:1 |
| White text | 10.30:1 |
Values
| HEX | #10436B |
| RGB | rgb(16, 67, 107) |
| HSL | hsl(206, 74%, 24%) |
| OKLCH | oklch(37.2% 0.086 247.1) |
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 #10436B | 10.30:1 | AAA | Lc -97.7 | Preferred for body text |
| Black text on #10436B | 2.03:1 | Fails | Lc 10.4 | Not readable |
| #10436B text on white | 10.30:1 | AAA | Lc 93.6 | Preferred for body text |
| #10436B text on black | 2.03:1 | Fails | Lc -8.9 | 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
#E0EBF6
oklch(93.5% 0.019 248)
-
Step 200
200
#C7DCF0
oklch(88.5% 0.036 246.9)
-
Step 300
300
#9FC5E9
oklch(80.8% 0.065 247.2)
-
Step 400
400
#69A6DE
oklch(70.6% 0.104 247.5)
-
Step 500
500
#3B8FD5
oklch(63.1% 0.133 247.2)
-
Step 600
600
#0978C2
oklch(55.7% 0.144 247)
-
Step 700
700
#0064A5
oklch(49% 0.13 247.2)
-
Step 800
800
#035288
oklch(42.7% 0.111 247.3)
-
Step 900
900 (this color)
#10436B
oklch(37.2% 0.086 247.1)
-
Step 950
950
#0D2840
oklch(27% 0.056 248.3)
#10436B 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) | #30456D | 0.032 |
| Deuteranopia (no green cones) | #233D6A | 0.022 |
| Tritanopia (no blue cones) | #004D52 | 0.062 |
| Achromatopsia (no color) | #404040 | 0.086 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #10436B
#10436B
oklch(37.2% 0.086 247.1)
- #5C3600
#5C3600
oklch(37.1% 0.082 67.4)
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 #10436B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.026
- Marine Blue #01386A ΔE 0.037
- Dark Grey Blue #29465B ΔE 0.038
- Charcoal #264653 ΔE 0.048
- Prussian Blue #1D3557 ΔE 0.050
- Dark Blue Grey #1F3B4D ΔE 0.053
- Light Navy #155084 ΔE 0.054
- Midnight Green #073B4C ΔE 0.057
Use #10436B 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.