#09439B
Closest named color: Cobalt (#1E488F). oklch(40.7% 0.154 259.9), rgb(9, 67, 155).
Aa
White text reads best on this color (9.17:1).
About this color
#09439B is a dark, vivid blue. In OKLCH its lightness is 41%, its chroma 0.154 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.028 away. White text reads best on it, at 9.17:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | vivid (0.154) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.28:1 |
| White text | 9.17:1 |
Values
| HEX | #09439B |
| RGB | rgb(9, 67, 155) |
| HSL | hsl(216, 89%, 32%) |
| OKLCH | oklch(40.7% 0.154 259.9) |
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 #09439B | 9.17:1 | AAA | Lc -94.9 | Preferred for body text |
| Black text on #09439B | 2.28:1 | Fails | Lc 13.5 | Not readable |
| #09439B text on white | 9.17:1 | AAA | Lc 90.4 | Preferred for body text |
| #09439B text on black | 2.28:1 | Fails | Lc -11.9 | 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 800.
-
Step 50
50
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E0EBFC
oklch(93.7% 0.026 259)
-
Step 200
200
#C6DAFB
oklch(88.4% 0.051 260.4)
-
Step 300
300
#9FC2FB
oklch(80.9% 0.09 260)
-
Step 400
400
#69A0FA
oklch(70.7% 0.145 259.8)
-
Step 500
500
#4085F7
oklch(63.2% 0.184 259.9)
-
Step 600
600
#1D6BE6
oklch(55.6% 0.201 259.9)
-
Step 700
700
#0F58C8
oklch(49.1% 0.187 260)
-
Step 800
800 (this color)
#09439B
oklch(40.7% 0.154 259.9)
-
Step 900
900
#163E80
oklch(37.7% 0.12 260)
-
Step 950
950
#0E254B
oklch(27% 0.076 259.9)
#09439B 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) | #004E9E | 0.029 |
| Deuteranopia (no green cones) | #004299 | 0.006 |
| Tritanopia (no blue cones) | #005968 | 0.117 |
| Achromatopsia (no color) | #484848 | 0.155 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #09439B
#09439B
oklch(40.7% 0.154 259.9)
- #614300
#614300
oklch(40.6% 0.084 79.7)
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 #09439B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.028
- Sapphire #2138AB ΔE 0.038
- Twilight Blue #0A437A ΔE 0.055
- Light Navy #155084 ΔE 0.057
- Dusk Blue #26538D ΔE 0.058
- Blueberry #464196 ΔE 0.062
- Deep Sea Blue #015482 ΔE 0.068
- Dark Slate Blue #483D8B ΔE 0.070
Use #09439B 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.