#15417D
Closest named color: Twilight Blue (#0A437A). oklch(38.1% 0.113 257.4), rgb(21, 65, 125).
Aa
White text reads best on this color (10.07:1).
About this color
#15417D is a dark, moderately saturated blue. In OKLCH its lightness is 38%, its chroma 0.113 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.010 away. White text reads best on it, at 10.07:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.113) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.08:1 |
| White text | 10.07:1 |
Values
| HEX | #15417D |
| RGB | rgb(21, 65, 125) |
| HSL | hsl(215, 71%, 29%) |
| OKLCH | oklch(38.1% 0.113 257.4) |
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 #15417D | 10.07:1 | AAA | Lc -97.1 | Preferred for body text |
| Black text on #15417D | 2.08:1 | Fails | Lc 11.0 | Not readable |
| #15417D text on white | 10.07:1 | AAA | Lc 93.0 | Preferred for body text |
| #15417D text on black | 2.08:1 | Fails | Lc -9.5 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E0EBFB
oklch(93.7% 0.025 257.6)
-
Step 200
200
#C6DBF9
oklch(88.5% 0.047 257.3)
-
Step 300
300
#9EC3F7
oklch(80.9% 0.084 256.9)
-
Step 400
400
#68A2F4
oklch(70.8% 0.135 257.2)
-
Step 500
500
#3D88EF
oklch(63.2% 0.172 257.2)
-
Step 600
600
#166EDE
oklch(55.5% 0.188 257.6)
-
Step 700
700
#045CC1
oklch(49.2% 0.174 257.3)
-
Step 800
800
#0B4B9C
oklch(42.6% 0.145 257.6)
-
Step 900
900 (this color)
#15417D
oklch(38.1% 0.113 257.4)
-
Step 950
950
#0D2648
oklch(27% 0.07 257)
#15417D 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) | #20477F | 0.021 |
| Deuteranopia (no green cones) | #053D7C | 0.016 |
| Tritanopia (no blue cones) | #004F59 | 0.085 |
| Achromatopsia (no color) | #424242 | 0.113 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #15417D
#15417D
oklch(38.1% 0.113 257.4)
- #5A3C00
#5A3C00
oklch(38.1% 0.08 77.1)
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 #15417D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.010
- Cobalt #1E488F ΔE 0.036
- Marine Blue #01386A ΔE 0.044
- Light Navy #155084 ΔE 0.045
- Deep Sea Blue #015482 ΔE 0.055
- Dusk Blue #26538D ΔE 0.061
- Dark Grey Blue #29465B ΔE 0.066
- Dark Slate Blue #483D8B ΔE 0.069
Use #15417D 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.