#355B61
Closest named color: Petrol (#005F6A). oklch(44.5% 0.044 208.5), rgb(53, 91, 97).
Aa
White text reads best on this color (7.44:1).
About this color
#355B61 is a dark, muted teal or cyan. In OKLCH its lightness is 45%, its chroma 0.044 and its hue 209°. Its hue sits on the cool side of the wheel. The nearest named color is Petrol (#005F6A), ΔE 0.032 away. White text reads best on it, at 7.44:1.
| Hue family | Teals and cyans |
| Lightness | dark (45%) |
| Chroma | muted (0.044) |
| Temperature | cool |
| Nearest name | Petrol (#005F6A) |
| Black text | 2.82:1 |
| White text | 7.44:1 |
Values
| HEX | #355B61 |
| RGB | rgb(53, 91, 97) |
| HSL | hsl(188, 29%, 29%) |
| OKLCH | oklch(44.5% 0.044 208.5) |
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 #355B61 | 7.44:1 | AAA | Lc -90.6 | Preferred for body text |
| Black text on #355B61 | 2.82:1 | Fails | Lc 18.2 | Dividers and decoration only |
| #355B61 text on white | 7.44:1 | AAA | Lc 85.8 | Fine for body text |
| #355B61 text on black | 2.82:1 | Fails | Lc -16.3 | 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
#F3F6F7
oklch(97.1% 0.003 219.5)
-
Step 100
100
#E4EBEC
oklch(93.5% 0.008 207.1)
-
Step 200
200
#CFDCDE
oklch(88.5% 0.014 207.9)
-
Step 300
300
#AEC6C9
oklch(80.9% 0.026 205.8)
-
Step 400
400
#83A8AE
oklch(70.6% 0.041 208.5)
-
Step 500
500
#63939A
oklch(63.2% 0.053 207.4)
-
Step 600
600
#487D85
oklch(55.6% 0.058 208)
-
Step 700
700
#396971
oklch(49% 0.054 209.4)
-
Step 800
800 (this color)
#355B61
oklch(44.5% 0.044 208.5)
-
Step 900
900
#2B474B
oklch(37.7% 0.034 207.2)
-
Step 950
950
#1A2A2C
oklch(27.2% 0.022 205.8)
#355B61 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) | #555861 | 0.043 |
| Deuteranopia (no green cones) | #4E5361 | 0.039 |
| Tritanopia (no blue cones) | #215E5D | 0.022 |
| Achromatopsia (no color) | #555555 | 0.045 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #355B61
#355B61
oklch(44.5% 0.044 208.5)
- #6B4B46
#6B4B46
oklch(44.6% 0.045 28.9)
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 #355B61, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Petrol #005F6A ΔE 0.032
- Dark Green Blue #1F6357 ΔE 0.039
- YInMn Blue #415A77 ΔE 0.042
- Dark Slate Gray #2F4F4F ΔE 0.044
- Deep Teal #00555A ΔE 0.045
- Dark Aqua #05696B ΔE 0.046
- Slate #516572 ΔE 0.055
- Dusty Grape #545775 ΔE 0.058
Use #355B61 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.