#355FA9
Closest named color: Mid Blue (#276AB3). oklch(49.4% 0.128 260.8), rgb(53, 95, 169).
Aa
White text reads best on this color (6.24:1).
About this color
#355FA9 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 49%, its chroma 0.128 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.032 away. White text reads best on it, at 6.24:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.128) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.36:1 |
| White text | 6.24:1 |
Values
| HEX | #355FA9 |
| RGB | rgb(53, 95, 169) |
| HSL | hsl(218, 52%, 44%) |
| OKLCH | oklch(49.4% 0.128 260.8) |
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 #355FA9 | 6.24:1 | AA | Lc -86.0 | Fine for body text |
| Black text on #355FA9 | 3.36:1 | AA large text | Lc 23.2 | Dividers and decoration only |
| #355FA9 text on white | 6.24:1 | AA | Lc 80.9 | Fine for body text |
| #355FA9 text on black | 3.36:1 | AA large text | Lc -21.0 | 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
#E3EAF6
oklch(93.5% 0.018 261.3)
-
Step 200
200
#CDDAF0
oklch(88.5% 0.033 261)
-
Step 300
300
#AAC2E9
oklch(80.9% 0.061 260.1)
-
Step 400
400
#7DA1DE
oklch(70.6% 0.098 260.7)
-
Step 500
500
#5C89D5
oklch(63.2% 0.125 260.4)
-
Step 600
600
#4271C3
oklch(55.6% 0.138 260.7)
-
Step 700
700 (this color)
#355FA9
oklch(49.4% 0.128 260.8)
-
Step 800
800
#2C4D88
oklch(42.7% 0.106 261.1)
-
Step 900
900
#27416D
oklch(37.8% 0.082 260.3)
-
Step 950
950
#172640
oklch(27% 0.053 260.8)
#355FA9 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) | #3C66AC | 0.022 |
| Deuteranopia (no green cones) | #285BA7 | 0.018 |
| Tritanopia (no blue cones) | #00707C | 0.103 |
| Achromatopsia (no color) | #606060 | 0.128 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #355FA9
#355FA9
oklch(49.4% 0.128 260.8)
- #7F5A00
#7F5A00
oklch(49.4% 0.102 80.7)
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 #355FA9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.032
- Denim Blue #3B5B92 ΔE 0.037
- Dusky Blue #475F94 ΔE 0.038
- French Blue #436BAD ΔE 0.039
- Denim #3B638C ΔE 0.051
- Peacock Blue #016795 ΔE 0.051
- Light Navy Blue #2E5A88 ΔE 0.055
- Dusk Blue #26538D ΔE 0.057
Use #355FA9 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.