#305B5D
Closest named color: Petrol (#005F6A). oklch(44.1% 0.048 199.5), rgb(48, 91, 93).
Aa
White text reads best on this color (7.55:1).
About this color
#305B5D is a dark, muted teal or cyan. In OKLCH its lightness is 44%, its chroma 0.048 and its hue 199°. Its hue sits on the cool side of the wheel. The nearest named color is Petrol (#005F6A), ΔE 0.030 away. White text reads best on it, at 7.55:1.
| Hue family | Teals and cyans |
| Lightness | dark (44%) |
| Chroma | muted (0.048) |
| Temperature | cool |
| Nearest name | Petrol (#005F6A) |
| Black text | 2.78:1 |
| White text | 7.55:1 |
Values
| HEX | #305B5D |
| RGB | rgb(48, 91, 93) |
| HSL | hsl(183, 32%, 28%) |
| OKLCH | oklch(44.1% 0.048 199.5) |
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 #305B5D | 7.55:1 | AAA | Lc -90.9 | Preferred for body text |
| Black text on #305B5D | 2.78:1 | Fails | Lc 17.9 | Dividers and decoration only |
| #305B5D text on white | 7.55:1 | AAA | Lc 86.1 | Fine for body text |
| #305B5D text on black | 2.78:1 | Fails | Lc -15.9 | Dividers and decoration only |
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
#F3F6F6
oklch(97.1% 0.003 197.1)
-
Step 100
100
#E4ECEC
oklch(93.7% 0.009 197)
-
Step 200
200
#CEDCDD
oklch(88.4% 0.015 202)
-
Step 300
300
#ADC6C7
oklch(80.8% 0.027 199.6)
-
Step 400
400
#80AAAB
oklch(70.8% 0.045 198)
-
Step 500
500
#5E9497
oklch(63% 0.057 200.3)
-
Step 600
600
#437F81
oklch(55.7% 0.063 198.3)
-
Step 700
700
#346B6D
oklch(49.1% 0.058 198.6)
-
Step 800
800 (this color)
#305B5D
oklch(44.1% 0.048 199.5)
-
Step 900
900
#284849
oklch(37.7% 0.038 198.2)
-
Step 950
950
#182A2B
oklch(27% 0.024 200.3)
#305B5D 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) | #56585D | 0.050 |
| Deuteranopia (no green cones) | #4E525D | 0.045 |
| Tritanopia (no blue cones) | #195E5B | 0.021 |
| Achromatopsia (no color) | #545454 | 0.048 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #305B5D
#305B5D
oklch(44.1% 0.048 199.5)
- #6B4848
#6B4848
oklch(44.1% 0.048 19.2)
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 #305B5D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Petrol #005F6A ΔE 0.030
- Dark Green Blue #1F6357 ΔE 0.033
- Deep Teal #00555A ΔE 0.039
- Dark Slate Gray #2F4F4F ΔE 0.040
- Dark Aqua #05696B ΔE 0.045
- YInMn Blue #415A77 ΔE 0.051
- Dark Blue Green #005249 ΔE 0.055
- Slate #516572 ΔE 0.062
Use #305B5D 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.