#10409E
Closest named color: Sapphire (#2138AB). oklch(40.5% 0.161 262), rgb(16, 64, 158).
Aa
White text reads best on this color (9.33:1).
About this color
#10409E is a dark, vivid blue. In OKLCH its lightness is 40%, its chroma 0.161 and its hue 262°. 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 9.33:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | vivid (0.161) |
| Temperature | cool |
| Nearest name | Sapphire (#2138AB) |
| Black text | 2.24:1 |
| White text | 9.33:1 |
Values
| HEX | #10409E |
| RGB | rgb(16, 64, 158) |
| HSL | hsl(220, 82%, 34%) |
| OKLCH | oklch(40.5% 0.161 262) |
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 #10409E | 9.33:1 | AAA | Lc -95.2 | Preferred for body text |
| Black text on #10409E | 2.24:1 | Fails | Lc 13.1 | Not readable |
| #10409E text on white | 9.33:1 | AAA | Lc 90.9 | Preferred for body text |
| #10409E 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
#E0EAFD
oklch(93.5% 0.028 263.4)
-
Step 200
200
#C7DAFD
oklch(88.5% 0.053 262.7)
-
Step 300
300
#9FC1FE
oklch(80.8% 0.094 261.9)
-
Step 400
400
#6B9EFE
oklch(70.6% 0.151 262.1)
-
Step 500
500
#4482FC
oklch(63% 0.193 262.1)
-
Step 600
600
#2568EB
oklch(55.6% 0.209 261.9)
-
Step 700
700
#1955CC
oklch(49% 0.194 262.1)
-
Step 800
800 (this color)
#10409E
oklch(40.5% 0.161 262)
-
Step 900
900
#193D83
oklch(37.8% 0.125 261.9)
-
Step 950
950
#0F244D
oklch(27% 0.081 262.1)
#10409E 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) | #004DA1 | 0.033 |
| Deuteranopia (no green cones) | #00419C | 0.008 |
| Tritanopia (no blue cones) | #005868 | 0.124 |
| Achromatopsia (no color) | #474747 | 0.161 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #10409E
#10409E
oklch(40.5% 0.161 262)
- #5F4400
#5F4400
oklch(40.6% 0.083 82.8)
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 #10409E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sapphire #2138AB ΔE 0.029
- Cobalt #1E488F ΔE 0.036
- Twilight Blue #0A437A ΔE 0.062
- Blueberry #464196 ΔE 0.062
- Light Navy #155084 ΔE 0.065
- Dusk Blue #26538D ΔE 0.066
- Blue Blue #2242C7 ΔE 0.069
- Dark Slate Blue #483D8B ΔE 0.070
Use #10409E 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.