#355D78
Closest named color: YInMn Blue (#415A77). oklch(46.1% 0.063 239.6), rgb(53, 93, 120).
Aa
White text reads best on this color (7.02:1).
About this color
#355D78 is a medium-dark, muted blue. In OKLCH its lightness is 46%, its chroma 0.063 and its hue 240°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.015 away. White text reads best on it, at 7.02:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | muted (0.063) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.98:1 |
| White text | 7.02:1 |
Values
| HEX | #355D78 |
| RGB | rgb(53, 93, 120) |
| HSL | hsl(204, 39%, 34%) |
| OKLCH | oklch(46.1% 0.063 239.6) |
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 #355D78 | 7.02:1 | AAA | Lc -89.2 | Fine for body text |
| Black text on #355D78 | 2.98:1 | Fails | Lc 19.8 | Dividers and decoration only |
| #355D78 text on white | 7.02:1 | AAA | Lc 84.2 | Fine for body text |
| #355D78 text on black | 2.98:1 | Fails | Lc -17.7 | 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 700.
-
Step 50
50
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E5EBEF
oklch(93.7% 0.008 236.6)
-
Step 200
200
#CFDBE3
oklch(88.5% 0.017 236.7)
-
Step 300
300
#AFC4D3
oklch(80.9% 0.031 238.9)
-
Step 400
400
#85A5BC
oklch(70.6% 0.049 239.6)
-
Step 500
500
#668FAC
oklch(63.1% 0.063 239.8)
-
Step 600
600
#4D7997
oklch(55.6% 0.067 239.4)
-
Step 700
700 (this color)
#355D78
oklch(46.1% 0.063 239.6)
-
Step 800
800
#335369
oklch(42.7% 0.053 239.7)
-
Step 900
900
#2D4555
oklch(37.8% 0.04 238.4)
-
Step 950
950
#1B2832
oklch(27% 0.026 242)
#355D78 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) | #515D79 | 0.035 |
| Deuteranopia (no green cones) | #485678 | 0.029 |
| Tritanopia (no blue cones) | #096466 | 0.051 |
| Achromatopsia (no color) | #595959 | 0.063 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #355D78
#355D78
oklch(46.1% 0.063 239.6)
- #725033
#725033
oklch(46.1% 0.063 60.8)
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 #355D78, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.015
- Light Navy Blue #2E5A88 ΔE 0.031
- Denim #3B638C ΔE 0.035
- Dusty Grape #545775 ΔE 0.041
- Petrol #005F6A ΔE 0.043
- Dusk #4E5481 ΔE 0.045
- Denim Blue #3B5B92 ΔE 0.046
- Slate #516572 ΔE 0.047
Use #355D78 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.