#0A409F
Closest named color: Sapphire (#2138AB). oklch(40.5% 0.163 261.2), rgb(10, 64, 159).
Aa
White text reads best on this color (9.34:1).
About this color
#0A409F is a dark, vivid blue. In OKLCH its lightness is 40%, its chroma 0.163 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Sapphire (#2138AB), ΔE 0.029 away. White text reads best on it, at 9.34:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | vivid (0.163) |
| Temperature | cool |
| Nearest name | Sapphire (#2138AB) |
| Black text | 2.24:1 |
| White text | 9.34:1 |
Values
| HEX | #0A409F |
| RGB | rgb(10, 64, 159) |
| HSL | hsl(218, 88%, 33%) |
| OKLCH | oklch(40.5% 0.163 261.2) |
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 #0A409F | 9.34:1 | AAA | Lc -95.2 | Preferred for body text |
| Black text on #0A409F | 2.24:1 | Fails | Lc 13.2 | Not readable |
| #0A409F text on white | 9.34:1 | AAA | Lc 90.8 | Preferred for body text |
| #0A409F text on black | 2.24:1 | Fails | Lc -11.5 | 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 800.
-
Step 50
50
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E0EBFD
oklch(93.7% 0.027 260.3)
-
Step 200
200
#C6DAFD
oklch(88.5% 0.053 261.7)
-
Step 300
300
#9EC1FF
oklch(80.8% 0.096 261.6)
-
Step 400
400
#699FFF
oklch(70.8% 0.152 261.1)
-
Step 500
500
#4083FD
oklch(63.2% 0.195 261.2)
-
Step 600
600
#1F68ED
oklch(55.6% 0.213 261.3)
-
Step 700
700
#1156CE
oklch(49.2% 0.197 261.1)
-
Step 800
800 (this color)
#0A409F
oklch(40.5% 0.163 261.2)
-
Step 900
900
#163D84
oklch(37.8% 0.128 261.2)
-
Step 950
950
#0E244D
oklch(26.9% 0.081 261.5)
#0A409F 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) | #004DA2 | 0.034 |
| Deuteranopia (no green cones) | #00409D | 0.005 |
| Tritanopia (no blue cones) | #005869 | 0.123 |
| Achromatopsia (no color) | #474747 | 0.164 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0A409F
#0A409F
oklch(40.5% 0.163 261.2)
- #604300
#604300
oklch(40.5% 0.084 80.6)
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 #0A409F, closest first.
No curated palette has a color within ΔE 0.04 of #0A409F.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sapphire #2138AB ΔE 0.029
- Cobalt #1E488F ΔE 0.038
- Twilight Blue #0A437A ΔE 0.063
- Blueberry #464196 ΔE 0.065
- Light Navy #155084 ΔE 0.067
- Blue Blue #2242C7 ΔE 0.068
- Dusk Blue #26538D ΔE 0.068
- Dark Slate Blue #483D8B ΔE 0.073
Use #0A409F 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.