#355D71
Closest named color: YInMn Blue (#415A77). oklch(45.7% 0.056 231.5), rgb(53, 93, 113).
Aa
White text reads best on this color (7.10:1).
About this color
#355D71 is a medium-dark, muted blue. In OKLCH its lightness is 46%, its chroma 0.056 and its hue 231°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.021 away. White text reads best on it, at 7.10:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | muted (0.056) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.95:1 |
| White text | 7.10:1 |
Values
| HEX | #355D71 |
| RGB | rgb(53, 93, 113) |
| HSL | hsl(200, 36%, 33%) |
| OKLCH | oklch(45.7% 0.056 231.5) |
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 #355D71 | 7.10:1 | AAA | Lc -89.5 | Fine for body text |
| Black text on #355D71 | 2.95:1 | Fails | Lc 19.5 | Dividers and decoration only |
| #355D71 text on white | 7.10:1 | AAA | Lc 84.5 | Fine for body text |
| #355D71 text on black | 2.95:1 | Fails | Lc -17.5 | 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E4EBEF
oklch(93.6% 0.009 232.4)
-
Step 200
200
#CEDCE3
oklch(88.6% 0.018 229)
-
Step 300
300
#ACC5D2
oklch(80.9% 0.033 230.4)
-
Step 400
400
#80A7BC
oklch(70.7% 0.052 232)
-
Step 500
500
#5F91AB
oklch(63.1% 0.066 231.9)
-
Step 600
600
#447B96
oklch(55.6% 0.072 231.3)
-
Step 700
700
#356880
oklch(49.2% 0.067 230.6)
-
Step 800
800 (this color)
#355D71
oklch(45.7% 0.056 231.5)
-
Step 900
900
#284655
oklch(37.7% 0.044 231.3)
-
Step 950
950
#182932
oklch(27% 0.028 232.3)
#355D71 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) | #535C72 | 0.038 |
| Deuteranopia (no green cones) | #4B5571 | 0.035 |
| Tritanopia (no blue cones) | #146363 | 0.043 |
| Achromatopsia (no color) | #585858 | 0.056 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #355D71
#355D71
oklch(45.7% 0.056 231.5)
- #714E3A
#714E3A
oklch(45.7% 0.057 50.6)
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 #355D71, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.021
- Petrol #005F6A ΔE 0.036
- Light Navy Blue #2E5A88 ΔE 0.042
- Dusty Grape #545775 ΔE 0.044
- Slate #516572 ΔE 0.045
- Denim #3B638C ΔE 0.046
- Dark Aqua #05696B ΔE 0.048
- Dusk #4E5481 ΔE 0.053
Use #355D71 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.