#355171
Closest named color: YInMn Blue (#415A77). oklch(42.7% 0.063 252.5), rgb(53, 81, 113).
Aa
White text reads best on this color (8.18:1).
About this color
#355171 is a dark, muted blue. In OKLCH its lightness is 43%, its chroma 0.063 and its hue 253°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.033 away. White text reads best on it, at 8.18:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | muted (0.063) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.56:1 |
| White text | 8.18:1 |
Values
| HEX | #355171 |
| RGB | rgb(53, 81, 113) |
| HSL | hsl(212, 36%, 33%) |
| OKLCH | oklch(42.7% 0.063 252.5) |
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 #355171 | 8.18:1 | AAA | Lc -92.8 | Preferred for body text |
| Black text on #355171 | 2.56:1 | Fails | Lc 15.8 | Dividers and decoration only |
| #355171 text on white | 8.18:1 | AAA | Lc 88.2 | Fine for body text |
| #355171 text on black | 2.56:1 | Fails | Lc -14.0 | 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
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E5EAF1
oklch(93.5% 0.011 256.7)
-
Step 200
200
#D0DAE7
oklch(88.5% 0.021 254.9)
-
Step 300
300
#B0C3D8
oklch(80.9% 0.036 250.9)
-
Step 400
400
#86A3C5
oklch(70.6% 0.06 252.7)
-
Step 500
500
#688CB6
oklch(63% 0.075 252.8)
-
Step 600
600
#4F76A2
oklch(55.6% 0.082 252.3)
-
Step 700
700
#40638B
oklch(49.1% 0.076 252.6)
-
Step 800
800 (this color)
#355171
oklch(42.7% 0.063 252.5)
-
Step 900
900
#2E435B
oklch(37.6% 0.049 252.4)
-
Step 950
950
#1B2735
oklch(26.8% 0.031 252.8)
#355171 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) | #445272 | 0.020 |
| Deuteranopia (no green cones) | #3D4C70 | 0.017 |
| Tritanopia (no blue cones) | #18585C | 0.055 |
| Achromatopsia (no color) | #4F4F4F | 0.063 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #355171
#355171
oklch(42.7% 0.063 252.5)
- #644925
#644925
oklch(42.6% 0.063 72.6)
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 #355171, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.033
- Light Navy Blue #2E5A88 ΔE 0.041
- Deep Sea Blue #015482 ΔE 0.041
- Light Navy #155084 ΔE 0.042
- Dusk #4E5481 ΔE 0.045
- Dusk Blue #26538D ΔE 0.047
- Dusty Grape #545775 ΔE 0.049
- Dark Grey Blue #29465B ΔE 0.050
Use #355171 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.