#305C58
Closest named color: Dark Green Blue (#1F6357). oklch(44.2% 0.049 187.9), rgb(48, 92, 88).
Aa
White text reads best on this color (7.50:1).
About this color
#305C58 is a dark, muted teal or cyan. In OKLCH its lightness is 44%, its chroma 0.049 and its hue 188°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Green Blue (#1F6357), ΔE 0.026 away. White text reads best on it, at 7.50:1.
| Hue family | Teals and cyans |
| Lightness | dark (44%) |
| Chroma | muted (0.049) |
| Temperature | cool |
| Nearest name | Dark Green Blue (#1F6357) |
| Black text | 2.79:1 |
| White text | 7.50:1 |
Values
| HEX | #305C58 |
| RGB | rgb(48, 92, 88) |
| HSL | hsl(175, 31%, 27%) |
| OKLCH | oklch(44.2% 0.049 187.9) |
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 #305C58 | 7.50:1 | AAA | Lc -90.8 | Preferred for body text |
| Black text on #305C58 | 2.79:1 | Fails | Lc 18.0 | Dividers and decoration only |
| #305C58 text on white | 7.50:1 | AAA | Lc 86.0 | Fine for body text |
| #305C58 text on black | 2.79:1 | Fails | Lc -16.1 | 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
#E4ECEB
oklch(93.7% 0.009 188.1)
-
Step 200
200
#CEDDDB
oklch(88.6% 0.016 187.3)
-
Step 300
300
#ADC7C4
oklch(80.9% 0.028 188.2)
-
Step 400
400
#80AAA6
oklch(70.6% 0.046 188.9)
-
Step 500
500
#5E9590
oklch(63% 0.059 188.5)
-
Step 600
600
#43807A
oklch(55.7% 0.064 187.2)
-
Step 700
700
#346C67
oklch(49.2% 0.06 187.8)
-
Step 800
800 (this color)
#305C58
oklch(44.2% 0.049 187.9)
-
Step 900
900
#284845
oklch(37.6% 0.038 188)
-
Step 950
950
#182A29
oklch(26.9% 0.024 191.4)
#305C58 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) | #585858 | 0.053 |
| Deuteranopia (no green cones) | #505259 | 0.050 |
| Tritanopia (no blue cones) | #1C5E5B | 0.016 |
| Achromatopsia (no color) | #555555 | 0.050 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #305C58
#305C58
oklch(44.2% 0.049 187.9)
- #6B484E
#6B484E
oklch(44.3% 0.049 8)
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 #305C58, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Green Blue #1F6357 ΔE 0.026
- Petrol #005F6A ΔE 0.035
- Deep Teal #00555A ΔE 0.041
- Dark Slate Gray #2F4F4F ΔE 0.041
- Dark Aqua #05696B ΔE 0.044
- Dark Blue Green #005249 ΔE 0.053
- Pine #2B5D34 ΔE 0.059
- YInMn Blue #415A77 ΔE 0.060
Use #305C58 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.