#355FA4
Closest named color: Denim Blue (#3B5B92). oklch(49.1% 0.121 259.8), rgb(53, 95, 164).
Aa
White text reads best on this color (6.31:1).
About this color
#355FA4 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 49%, its chroma 0.121 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Denim Blue (#3B5B92), ΔE 0.029 away. White text reads best on it, at 6.31:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.121) |
| Temperature | cool |
| Nearest name | Denim Blue (#3B5B92) |
| Black text | 3.32:1 |
| White text | 6.31:1 |
Values
| HEX | #355FA4 |
| RGB | rgb(53, 95, 164) |
| HSL | hsl(217, 51%, 43%) |
| OKLCH | oklch(49.1% 0.121 259.8) |
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 #355FA4 | 6.31:1 | AA | Lc -86.3 | Fine for body text |
| Black text on #355FA4 | 3.32:1 | AA large text | Lc 22.9 | Dividers and decoration only |
| #355FA4 text on white | 6.31:1 | AA | Lc 81.2 | Fine for body text |
| #355FA4 text on black | 3.32:1 | AA large text | Lc -20.7 | 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
#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
#7EA2DB
oklch(70.8% 0.093 259.4)
-
Step 500
500
#5D89D1
oklch(63% 0.12 259.8)
-
Step 600
600
#4372BE
oklch(55.6% 0.129 259.6)
-
Step 700
700 (this color)
#355FA4
oklch(49.1% 0.121 259.8)
-
Step 800
800
#2C4E85
oklch(42.7% 0.1 259.6)
-
Step 900
900
#28416B
oklch(37.7% 0.079 260.2)
-
Step 950
950
#18263E
oklch(26.9% 0.049 260.7)
#355FA4 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) | #3F65A7 | 0.021 |
| Deuteranopia (no green cones) | #2E5BA3 | 0.014 |
| Tritanopia (no blue cones) | #006F79 | 0.099 |
| Achromatopsia (no color) | #606060 | 0.121 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #355FA4
#355FA4
oklch(49.1% 0.121 259.8)
- #7F5900
#7F5900
oklch(49.2% 0.102 79.8)
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 #355FA4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim Blue #3B5B92 ΔE 0.029
- Dusky Blue #475F94 ΔE 0.032
- Mid Blue #276AB3 ΔE 0.035
- French Blue #436BAD ΔE 0.040
- Denim #3B638C ΔE 0.043
- Peacock Blue #016795 ΔE 0.045
- Light Navy Blue #2E5A88 ΔE 0.047
- Dusk Blue #26538D ΔE 0.051
Use #355FA4 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.