#305F58
Closest named color: Dark Green Blue (#1F6357). oklch(45% 0.053 183.1), rgb(48, 95, 88).
Aa
White text reads best on this color (7.23:1).
About this color
#305F58 is a dark, muted teal or cyan. In OKLCH its lightness is 45%, its chroma 0.053 and its hue 183°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Green Blue (#1F6357), ΔE 0.018 away. White text reads best on it, at 7.23:1.
| Hue family | Teals and cyans |
| Lightness | dark (45%) |
| Chroma | muted (0.053) |
| Temperature | cool |
| Nearest name | Dark Green Blue (#1F6357) |
| Black text | 2.90:1 |
| White text | 7.23:1 |
Values
| HEX | #305F58 |
| RGB | rgb(48, 95, 88) |
| HSL | hsl(171, 33%, 28%) |
| OKLCH | oklch(45% 0.053 183.1) |
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 #305F58 | 7.23:1 | AAA | Lc -89.9 | Fine for body text |
| Black text on #305F58 | 2.90:1 | Fails | Lc 19.0 | Dividers and decoration only |
| #305F58 text on white | 7.23:1 | AAA | Lc 85.0 | Fine for body text |
| #305F58 text on black | 2.90:1 | Fails | Lc -17.0 | 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
#CDDDDA
oklch(88.5% 0.018 183.5)
-
Step 300
300
#ACC8C2
oklch(81% 0.031 181.1)
-
Step 400
400
#7EABA3
oklch(70.6% 0.05 182.7)
-
Step 500
500
#5C968D
oklch(63.1% 0.063 183.4)
-
Step 600
600
#3F8177
oklch(55.7% 0.07 182.6)
-
Step 700
700
#316D64
oklch(49.2% 0.064 182.5)
-
Step 800
800 (this color)
#305F58
oklch(45% 0.053 183.1)
-
Step 900
900
#264944
oklch(37.7% 0.042 183.9)
-
Step 950
950
#172B28
oklch(27.1% 0.027 183.8)
#305F58 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) | #5B5A58 | 0.057 |
| Deuteranopia (no green cones) | #535559 | 0.052 |
| Tritanopia (no blue cones) | #1B615D | 0.016 |
| Achromatopsia (no color) | #575757 | 0.053 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #305F58
#305F58
oklch(45% 0.053 183.1)
- #6F4952
#6F4952
oklch(45.1% 0.053 3.9)
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 #305F58, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Green Blue #1F6357 ΔE 0.018
- Petrol #005F6A ΔE 0.037
- Dark Aqua #05696B ΔE 0.038
- Deep Teal #00555A ΔE 0.048
- Dark Slate Gray #2F4F4F ΔE 0.050
- Pine #2B5D34 ΔE 0.056
- Dark Blue Green #005249 ΔE 0.059
- Spruce #0A5F38 ΔE 0.061
Use #305F58 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.