#355C78
Closest named color: YInMn Blue (#415A77). oklch(45.8% 0.064 241.3), rgb(53, 92, 120).
Aa
White text reads best on this color (7.11:1).
About this color
#355C78 is a medium-dark, muted blue. In OKLCH its lightness is 46%, its chroma 0.064 and its hue 241°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.014 away. White text reads best on it, at 7.11:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | muted (0.064) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.95:1 |
| White text | 7.11:1 |
Values
| HEX | #355C78 |
| RGB | rgb(53, 92, 120) |
| HSL | hsl(205, 39%, 34%) |
| OKLCH | oklch(45.8% 0.064 241.3) |
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 #355C78 | 7.11:1 | AAA | Lc -89.5 | Fine for body text |
| Black text on #355C78 | 2.95:1 | Fails | Lc 19.5 | Dividers and decoration only |
| #355C78 text on white | 7.11:1 | AAA | Lc 84.5 | Fine for body text |
| #355C78 text on black | 2.95:1 | Fails | Lc -17.4 | 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
#E4EBF1
oklch(93.6% 0.011 243.7)
-
Step 200
200
#CEDBE6
oklch(88.5% 0.021 243.4)
-
Step 300
300
#ACC4D7
oklch(80.8% 0.038 241.9)
-
Step 400
400
#80A6C3
oklch(70.8% 0.059 241.5)
-
Step 500
500
#5E90B4
oklch(63.2% 0.077 240.8)
-
Step 600
600
#43799F
oklch(55.5% 0.083 241.1)
-
Step 700
700
#356688
oklch(49.1% 0.076 241)
-
Step 800
800 (this color)
#355C78
oklch(45.8% 0.064 241.3)
-
Step 900
900
#28455A
oklch(37.7% 0.05 241.3)
-
Step 950
950
#182835
oklch(26.9% 0.033 243.9)
#355C78 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) | #505C79 | 0.034 |
| Deuteranopia (no green cones) | #475578 | 0.029 |
| Tritanopia (no blue cones) | #0A6365 | 0.053 |
| Achromatopsia (no color) | #585858 | 0.064 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #355C78
#355C78
oklch(45.8% 0.064 241.3)
- #714F31
#714F31
oklch(45.7% 0.064 61.6)
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 #355C78, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.014
- Light Navy Blue #2E5A88 ΔE 0.029
- Denim #3B638C ΔE 0.037
- Dusty Grape #545775 ΔE 0.041
- Dusk #4E5481 ΔE 0.044
- Petrol #005F6A ΔE 0.044
- Denim Blue #3B5B92 ΔE 0.045
- Deep Sea Blue #015482 ΔE 0.049
Use #355C78 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.