#355F59
Closest named color: Dark Green Blue (#1F6357). oklch(45.3% 0.048 184), rgb(53, 95, 89).
Aa
White text reads best on this color (7.16:1).
About this color
#355F59 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 45%, its chroma 0.048 and its hue 184°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Green Blue (#1F6357), ΔE 0.022 away. White text reads best on it, at 7.16:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (45%) |
| Chroma | muted (0.048) |
| Temperature | cool |
| Nearest name | Dark Green Blue (#1F6357) |
| Black text | 2.93:1 |
| White text | 7.16:1 |
Values
| HEX | #355F59 |
| RGB | rgb(53, 95, 89) |
| HSL | hsl(171, 28%, 29%) |
| OKLCH | oklch(45.3% 0.048 184) |
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 #355F59 | 7.16:1 | AAA | Lc -89.7 | Fine for body text |
| Black text on #355F59 | 2.93:1 | Fails | Lc 19.3 | Dividers and decoration only |
| #355F59 text on white | 7.16:1 | AAA | Lc 84.8 | Fine for body text |
| #355F59 text on black | 2.93:1 | Fails | Lc -17.2 | 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
#ADC7C2
oklch(80.9% 0.029 182.7)
-
Step 400
400
#81AAA4
oklch(70.6% 0.045 185.1)
-
Step 500
500
#60958D
oklch(63% 0.058 183.9)
-
Step 600
600
#457F77
oklch(55.4% 0.063 184.2)
-
Step 700
700
#366C64
oklch(49.2% 0.059 183.1)
-
Step 800
800 (this color)
#355F59
oklch(45.3% 0.048 184)
-
Step 900
900
#294844
oklch(37.6% 0.038 185.3)
-
Step 950
950
#192A28
oklch(26.9% 0.023 186.7)
#355F59 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) | #5B5B59 | 0.051 |
| Deuteranopia (no green cones) | #54555A | 0.049 |
| Tritanopia (no blue cones) | #24615D | 0.015 |
| Achromatopsia (no color) | #585858 | 0.049 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #355F59
#355F59
oklch(45.3% 0.048 184)
- #6D4B53
#6D4B53
oklch(45.3% 0.048 3.7)
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 #355F59, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Green Blue #1F6357 ΔE 0.022
- Petrol #005F6A ΔE 0.039
- Dark Aqua #05696B ΔE 0.039
- Dark Slate Gray #2F4F4F ΔE 0.052
- Deep Teal #00555A ΔE 0.052
- Slate #516572 ΔE 0.057
- Pine #2B5D34 ΔE 0.059
- YInMn Blue #415A77 ΔE 0.060
Use #355F59 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.