#355457
Closest named color: Dark Slate Gray (#2F4F4F). oklch(42.3% 0.037 203.6), rgb(53, 84, 87).
Aa
White text reads best on this color (8.21:1).
About this color
#355457 is a dark, muted teal or cyan. In OKLCH its lightness is 42%, its chroma 0.037 and its hue 204°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.021 away. White text reads best on it, at 8.21:1.
| Hue family | Teals and cyans |
| Lightness | dark (42%) |
| Chroma | muted (0.037) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.55:1 |
| White text | 8.21:1 |
Values
| HEX | #355457 |
| RGB | rgb(53, 84, 87) |
| HSL | hsl(185, 24%, 27%) |
| OKLCH | oklch(42.3% 0.037 203.6) |
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 #355457 | 8.21:1 | AAA | Lc -93.0 | Preferred for body text |
| Black text on #355457 | 2.55:1 | Fails | Lc 15.7 | Dividers and decoration only |
| #355457 text on white | 8.21:1 | AAA | Lc 88.3 | Fine for body text |
| #355457 text on black | 2.55:1 | Fails | Lc -13.8 | Not readable |
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
#E5EBEC
oklch(93.6% 0.007 208.8)
-
Step 200
200
#D1DCDD
oklch(88.6% 0.012 203.5)
-
Step 300
300
#B1C5C7
oklch(80.9% 0.022 204)
-
Step 400
400
#88A7AA
oklch(70.6% 0.034 203.7)
-
Step 500
500
#6A9296
oklch(63.2% 0.044 203.8)
-
Step 600
600
#517C80
oklch(55.6% 0.048 203.3)
-
Step 700
700
#41686C
oklch(49% 0.044 204.1)
-
Step 800
800 (this color)
#355457
oklch(42.3% 0.037 203.6)
-
Step 900
900
#2F4648
oklch(37.6% 0.029 202.8)
-
Step 950
950
#1C292A
oklch(26.9% 0.018 202.1)
#355457 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) | #505157 | 0.038 |
| Deuteranopia (no green cones) | #4A4D57 | 0.035 |
| Tritanopia (no blue cones) | #285655 | 0.016 |
| Achromatopsia (no color) | #4F4F4F | 0.037 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #355457
#355457
oklch(42.3% 0.037 203.6)
- #614644
#614644
oklch(42.3% 0.038 23.6)
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 #355457, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.021
- Deep Teal #00555A ΔE 0.036
- Petrol #005F6A ΔE 0.045
- Dark Blue Green #005249 ΔE 0.048
- Dark Green Blue #1F6357 ΔE 0.050
- Dark Teal #014D4E ΔE 0.051
- Charcoal #264653 ΔE 0.051
- Dark Grey Blue #29465B ΔE 0.052
Use #355457 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.