#09339C
Closest named color: Sapphire (#2138AB). oklch(37.6% 0.176 263.5), rgb(9, 51, 156).
Aa
White text reads best on this color (10.68:1).
About this color
#09339C is a dark, vivid blue. In OKLCH its lightness is 38%, its chroma 0.176 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Sapphire (#2138AB), ΔE 0.035 away. White text reads best on it, at 10.68:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | vivid (0.176) |
| Temperature | cool |
| Nearest name | Sapphire (#2138AB) |
| Black text | 1.96:1 |
| White text | 10.68:1 |
Values
| HEX | #09339C |
| RGB | rgb(9, 51, 156) |
| HSL | hsl(223, 89%, 32%) |
| OKLCH | oklch(37.6% 0.176 263.5) |
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 #09339C | 10.68:1 | AAA | Lc -97.9 | Preferred for body text |
| Black text on #09339C | 1.96:1 | Fails | Lc 10.1 | Not readable |
| #09339C text on white | 10.68:1 | AAA | Lc 93.8 | Preferred for body text |
| #09339C text on black | 1.96:1 | Fails | Lc -8.7 | 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
#F1F6FF
oklch(97.2% 0.013 262.4)
-
Step 100
100
#DFEAFF
oklch(93.5% 0.031 263.5)
-
Step 200
200
#C6DAFF
oklch(88.5% 0.056 262.8)
-
Step 300
300
#A1C1FF
oklch(81% 0.095 263.3)
-
Step 400
400
#6E9DFF
oklch(70.6% 0.153 263.6)
-
Step 500
500
#4881FF
oklch(63.2% 0.197 263.5)
-
Step 600
600
#1F60FF
oklch(55.6% 0.244 263.5)
-
Step 700
700
#0043F1
oklch(49% 0.262 263.5)
-
Step 800
800
#0137C7
oklch(42.7% 0.225 263.5)
-
Step 900
900 (this color)
#09339C
oklch(37.6% 0.176 263.5)
-
Step 950
950
#07205B
oklch(27% 0.11 263.3)
#09339C 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) | #00459F | 0.044 |
| Deuteranopia (no green cones) | #00379A | 0.009 |
| Tritanopia (no blue cones) | #005063 | 0.134 |
| Achromatopsia (no color) | #3E3E3E | 0.176 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #09339C
#09339C
oklch(37.6% 0.176 263.5)
- #553D00
#553D00
oklch(37.7% 0.077 83.5)
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 #09339C, closest first.
No curated palette has a color within ΔE 0.04 of #09339C.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sapphire #2138AB ΔE 0.035
- Royal #0C1793 ΔE 0.056
- Cobalt Blue #030AA7 ΔE 0.062
- Cobalt #1E488F ΔE 0.063
- Ultramarine #2000B1 ΔE 0.064
- Indigo Blue #3A18B1 ΔE 0.068
- Twilight Blue #0A437A ΔE 0.072
- Blueberry #464196 ΔE 0.082
Use #09339C 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.