#355EA3
Closest named color: Denim Blue (#3B5B92). oklch(48.8% 0.12 260.2), rgb(53, 94, 163).
Aa
White text reads best on this color (6.39:1).
About this color
#355EA3 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 49%, its chroma 0.120 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Denim Blue (#3B5B92), ΔE 0.027 away. White text reads best on it, at 6.39:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.120) |
| Temperature | cool |
| Nearest name | Denim Blue (#3B5B92) |
| Black text | 3.28:1 |
| White text | 6.39:1 |
Values
| HEX | #355EA3 |
| RGB | rgb(53, 94, 163) |
| HSL | hsl(218, 51%, 42%) |
| OKLCH | oklch(48.8% 0.12 260.2) |
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 #355EA3 | 6.39:1 | AA | Lc -86.7 | Fine for body text |
| Black text on #355EA3 | 3.28:1 | AA large text | Lc 22.5 | Dividers and decoration only |
| #355EA3 text on white | 6.39:1 | AA | Lc 81.5 | Fine for body text |
| #355EA3 text on black | 3.28:1 | AA large text | Lc -20.3 | 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
#7FA1DB
oklch(70.6% 0.094 260.8)
-
Step 500
500
#5E89D1
oklch(63.1% 0.119 260.2)
-
Step 600
600
#4472BE
oklch(55.6% 0.129 259.9)
-
Step 700
700 (this color)
#355EA3
oklch(48.8% 0.12 260.2)
-
Step 800
800
#2D4E85
oklch(42.7% 0.1 260.1)
-
Step 900
900
#28416A
oklch(37.6% 0.077 259.8)
-
Step 950
950
#18263E
oklch(26.9% 0.049 260.7)
#355EA3 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) | #3E64A6 | 0.021 |
| Deuteranopia (no green cones) | #2D5AA2 | 0.015 |
| Tritanopia (no blue cones) | #006E78 | 0.099 |
| Achromatopsia (no color) | #5F5F5F | 0.120 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #355EA3
#355EA3
oklch(48.8% 0.12 260.2)
- #7D5800
#7D5800
oklch(48.7% 0.101 80.2)
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 #355EA3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim Blue #3B5B92 ΔE 0.027
- Dusky Blue #475F94 ΔE 0.031
- Mid Blue #276AB3 ΔE 0.038
- French Blue #436BAD ΔE 0.043
- Denim #3B638C ΔE 0.043
- Light Navy Blue #2E5A88 ΔE 0.045
- Peacock Blue #016795 ΔE 0.046
- Dusk Blue #26538D ΔE 0.049
Use #355EA3 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.