#15409A
Closest named color: Cobalt (#1E488F). oklch(40.3% 0.155 262.5), rgb(21, 64, 154).
Aa
White text reads best on this color (9.40:1).
About this color
#15409A is a dark, vivid blue. In OKLCH its lightness is 40%, its chroma 0.155 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.031 away. White text reads best on it, at 9.40:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | vivid (0.155) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.23:1 |
| White text | 9.40:1 |
Values
| HEX | #15409A |
| RGB | rgb(21, 64, 154) |
| HSL | hsl(221, 76%, 34%) |
| OKLCH | oklch(40.3% 0.155 262.5) |
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 #15409A | 9.40:1 | AAA | Lc -95.5 | Preferred for body text |
| Black text on #15409A | 2.23:1 | Fails | Lc 12.8 | Not readable |
| #15409A text on white | 9.40:1 | AAA | Lc 91.1 | Preferred for body text |
| #15409A text on black | 2.23:1 | Fails | Lc -11.2 | 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 800.
-
Step 50
50
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E1EAFC
oklch(93.6% 0.026 264.4)
-
Step 200
200
#C8DAFB
oklch(88.5% 0.05 262.6)
-
Step 300
300
#A1C1FC
oklch(80.9% 0.091 262.4)
-
Step 400
400
#6F9EFA
oklch(70.6% 0.145 262.7)
-
Step 500
500
#4983F7
oklch(63.1% 0.184 262.4)
-
Step 600
600
#2C69E6
oklch(55.6% 0.2 262.4)
-
Step 700
700
#2056C8
oklch(49% 0.187 262.6)
-
Step 800
800 (this color)
#15409A
oklch(40.3% 0.155 262.5)
-
Step 900
900
#1C3D80
oklch(37.7% 0.12 262.5)
-
Step 950
950
#11244B
oklch(26.9% 0.077 262.8)
#15409A 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) | #004C9D | 0.031 |
| Deuteranopia (no green cones) | #004098 | 0.011 |
| Tritanopia (no blue cones) | #005766 | 0.120 |
| Achromatopsia (no color) | #464646 | 0.155 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #15409A
#15409A
oklch(40.3% 0.155 262.5)
- #5E4300
#5E4300
oklch(40.2% 0.083 82.4)
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 #15409A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.031
- Sapphire #2138AB ΔE 0.034
- Twilight Blue #0A437A ΔE 0.056
- Blueberry #464196 ΔE 0.058
- Light Navy #155084 ΔE 0.061
- Dusk Blue #26538D ΔE 0.063
- Dark Slate Blue #483D8B ΔE 0.065
- Deep Sea Blue #015482 ΔE 0.073
Use #15409A 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.