#09303B
Closest named color: Oxford Blue (#1B263B). oklch(28.8% 0.046 220.9), rgb(9, 48, 59).
Aa
White text reads best on this color (14.02:1).
About this color
#09303B is a dark, muted teal or cyan. In OKLCH its lightness is 29%, its chroma 0.046 and its hue 221°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.037 away. White text reads best on it, at 14.02:1.
| Hue family | Teals and cyans |
| Lightness | dark (29%) |
| Chroma | muted (0.046) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.49:1 |
| White text | 14.02:1 |
Values
| HEX | #09303B |
| RGB | rgb(9, 48, 59) |
| HSL | hsl(193, 74%, 13%) |
| OKLCH | oklch(28.8% 0.046 220.9) |
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 #09303B | 14.02:1 | AAA | Lc -103.5 | Preferred for body text |
| Black text on #09303B | 1.49:1 | Fails | Lc 0.0 | Not readable |
| #09303B text on white | 14.02:1 | AAA | Lc 100.5 | Preferred for body text |
| #09303B text on black | 1.49:1 | Fails | Lc 0.0 | 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 950.
-
Step 50
50
#F0F7F9
oklch(97.1% 0.008 216.6)
-
Step 100
100
#DFEDF1
oklch(93.7% 0.016 216.7)
-
Step 200
200
#C4DEE7
oklch(88.4% 0.03 220.6)
-
Step 300
300
#9AC9DA
oklch(80.8% 0.055 222.1)
-
Step 400
400
#5CADC7
oklch(70.6% 0.088 221.2)
-
Step 500
500
#1498B9
oklch(63.1% 0.112 221.2)
-
Step 600
600
#00809D
oklch(55.6% 0.102 221.1)
-
Step 700
700
#006C84
oklch(49.2% 0.09 220.2)
-
Step 800
800
#00586D
oklch(42.6% 0.078 221.3)
-
Step 900
900
#00495B
oklch(37.6% 0.069 221.4)
-
Step 950
950 (this color)
#09303B
oklch(28.8% 0.046 220.9)
#09303B 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) | #292F3C | 0.037 |
| Deuteranopia (no green cones) | #232A3B | 0.033 |
| Tritanopia (no blue cones) | #003434 | 0.023 |
| Achromatopsia (no color) | #2C2C2C | 0.047 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #09303B
#09303B
oklch(28.8% 0.046 220.9)
- #3E2319
#3E2319
oklch(28.9% 0.045 41)
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 #09303B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.037
- Gunmetal #293241 ΔE 0.040
- Dark #1B2431 ΔE 0.042
- Midnight Green #073B4C ΔE 0.043
- Space Cadet #2B2D42 ΔE 0.045
- Jet #212529 ΔE 0.046
- Dark Blue Grey #1F3B4D ΔE 0.052
- Prussian Blue #1D3557 ΔE 0.057
Use #09303B 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.