#355FA3
Closest named color: Denim Blue (#3B5B92). oklch(49% 0.119 259.6), rgb(53, 95, 163).
Aa
White text reads best on this color (6.33:1).
About this color
#355FA3 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 49%, its chroma 0.119 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Denim Blue (#3B5B92), ΔE 0.028 away. White text reads best on it, at 6.33:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.119) |
| Temperature | cool |
| Nearest name | Denim Blue (#3B5B92) |
| Black text | 3.31:1 |
| White text | 6.33:1 |
Values
| HEX | #355FA3 |
| RGB | rgb(53, 95, 163) |
| HSL | hsl(217, 51%, 42%) |
| OKLCH | oklch(49% 0.119 259.6) |
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 #355FA3 | 6.33:1 | AA | Lc -86.4 | Fine for body text |
| Black text on #355FA3 | 3.31:1 | AA large text | Lc 22.8 | Dividers and decoration only |
| #355FA3 text on white | 6.33:1 | AA | Lc 81.2 | Fine for body text |
| #355FA3 text on black | 3.31:1 | AA large text | Lc -20.6 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E3EAF5
oklch(93.5% 0.017 259.4)
-
Step 200
200
#CDDAEF
oklch(88.5% 0.032 260)
-
Step 300
300
#ABC2E7
oklch(80.9% 0.058 259.9)
-
Step 400
400
#7EA2DA
oklch(70.7% 0.092 259)
-
Step 500
500
#5E89D0
oklch(63% 0.118 260)
-
Step 600
600
#4472BD
oklch(55.6% 0.128 259.7)
-
Step 700
700 (this color)
#355FA3
oklch(49% 0.119 259.6)
-
Step 800
800
#2D4E84
oklch(42.7% 0.098 259.8)
-
Step 900
900
#28416A
oklch(37.6% 0.077 259.8)
-
Step 950
950
#18263E
oklch(26.9% 0.049 260.7)
#355FA3 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) | #4065A6 | 0.022 |
| Deuteranopia (no green cones) | #2F5BA2 | 0.014 |
| Tritanopia (no blue cones) | #006F79 | 0.097 |
| Achromatopsia (no color) | #606060 | 0.119 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #355FA3
#355FA3
oklch(49% 0.119 259.6)
- #7E5800
#7E5800
oklch(48.8% 0.101 79.5)
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 #355FA3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim Blue #3B5B92 ΔE 0.028
- Dusky Blue #475F94 ΔE 0.030
- Mid Blue #276AB3 ΔE 0.036
- French Blue #436BAD ΔE 0.040
- Denim #3B638C ΔE 0.042
- Peacock Blue #016795 ΔE 0.044
- Light Navy Blue #2E5A88 ΔE 0.045
- Dusk Blue #26538D ΔE 0.050
Use #355FA3 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.