#305A55
Closest named color: Dark Green Blue (#1F6357). oklch(43.5% 0.048 185.7), rgb(48, 90, 85).
Aa
White text reads best on this color (7.72:1).
About this color
#305A55 is a dark, muted teal or cyan. In OKLCH its lightness is 44%, its chroma 0.048 and its hue 186°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Green Blue (#1F6357), ΔE 0.030 away. White text reads best on it, at 7.72:1.
| Hue family | Teals and cyans |
| Lightness | dark (44%) |
| Chroma | muted (0.048) |
| Temperature | cool |
| Nearest name | Dark Green Blue (#1F6357) |
| Black text | 2.71:1 |
| White text | 7.72:1 |
Values
| HEX | #305A55 |
| RGB | rgb(48, 90, 85) |
| HSL | hsl(173, 30%, 27%) |
| OKLCH | oklch(43.5% 0.048 185.7) |
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 #305A55 | 7.72:1 | AAA | Lc -91.5 | Preferred for body text |
| Black text on #305A55 | 2.71:1 | Fails | Lc 17.3 | Dividers and decoration only |
| #305A55 text on white | 7.72:1 | AAA | Lc 86.7 | Fine for body text |
| #305A55 text on black | 2.71:1 | Fails | Lc -15.4 | 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
#E4ECEA
oklch(93.6% 0.009 179.6)
-
Step 200
200
#CEDDDA
oklch(88.5% 0.017 182.7)
-
Step 300
300
#ADC7C3
oklch(80.9% 0.029 185.4)
-
Step 400
400
#81AAA4
oklch(70.6% 0.045 185.1)
-
Step 500
500
#60958E
oklch(63.1% 0.058 185.4)
-
Step 600
600
#457F78
oklch(55.5% 0.062 185.6)
-
Step 700
700
#366C65
oklch(49.2% 0.059 184.6)
-
Step 800
800 (this color)
#305A55
oklch(43.5% 0.048 185.7)
-
Step 900
900
#294844
oklch(37.6% 0.038 185.3)
-
Step 950
950
#192A28
oklch(26.9% 0.023 186.7)
#305A55 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) | #565655 | 0.051 |
| Deuteranopia (no green cones) | #4F5156 | 0.048 |
| Tritanopia (no blue cones) | #1E5C58 | 0.015 |
| Achromatopsia (no color) | #535353 | 0.048 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #305A55
#305A55
oklch(43.5% 0.048 185.7)
- #68464D
#68464D
oklch(43.4% 0.048 5.7)
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 #305A55, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Green Blue #1F6357 ΔE 0.030
- Dark Slate Gray #2F4F4F ΔE 0.035
- Deep Teal #00555A ΔE 0.038
- Petrol #005F6A ΔE 0.038
- Dark Blue Green #005249 ΔE 0.048
- Dark Aqua #05696B ΔE 0.050
- Pine #2B5D34 ΔE 0.057
- Dark Teal #014D4E ΔE 0.058
Use #305A55 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.