#355D9B
Closest named color: Denim Blue (#3B5B92). oklch(48% 0.11 258.9), rgb(53, 93, 155).
Aa
White text reads best on this color (6.58:1).
About this color
#355D9B is a medium-dark, moderately saturated blue. In OKLCH its lightness is 48%, its chroma 0.110 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Denim Blue (#3B5B92), ΔE 0.015 away. White text reads best on it, at 6.58:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | moderately saturated (0.110) |
| Temperature | cool |
| Nearest name | Denim Blue (#3B5B92) |
| Black text | 3.19:1 |
| White text | 6.58:1 |
Values
| HEX | #355D9B |
| RGB | rgb(53, 93, 155) |
| HSL | hsl(216, 49%, 41%) |
| OKLCH | oklch(48% 0.11 258.9) |
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 #355D9B | 6.58:1 | AA | Lc -87.4 | Fine for body text |
| Black text on #355D9B | 3.19:1 | AA large text | Lc 21.7 | Dividers and decoration only |
| #355D9B text on white | 6.58:1 | AA | Lc 82.4 | Fine for body text |
| #355D9B text on black | 3.19:1 | AA large text | Lc -19.6 | 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
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E4EAF4
oklch(93.5% 0.015 260.7)
-
Step 200
200
#CEDAED
oklch(88.5% 0.029 259.6)
-
Step 300
300
#ACC2E4
oklch(80.9% 0.054 259)
-
Step 400
400
#80A2D6
oklch(70.7% 0.085 258.7)
-
Step 500
500
#608ACB
oklch(63.1% 0.109 258.9)
-
Step 600
600
#4773B8
oklch(55.6% 0.118 259.1)
-
Step 700
700 (this color)
#355D9B
oklch(48% 0.11 258.9)
-
Step 800
800
#2F4F80
oklch(42.8% 0.09 258.7)
-
Step 900
900
#2A4267
oklch(37.8% 0.07 258.8)
-
Step 950
950
#19273C
oklch(27.1% 0.044 258.3)
#355D9B 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) | #41629D | 0.021 |
| Deuteranopia (no green cones) | #33599A | 0.012 |
| Tritanopia (no blue cones) | #006B74 | 0.091 |
| Achromatopsia (no color) | #5D5D5D | 0.110 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #355D9B
#355D9B
oklch(48% 0.11 258.9)
- #7C5600
#7C5600
oklch(48.2% 0.1 78.9)
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 #355D9B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim Blue #3B5B92 ΔE 0.015
- Dusky Blue #475F94 ΔE 0.025
- Light Navy Blue #2E5A88 ΔE 0.033
- Denim #3B638C ΔE 0.034
- Dusk Blue #26538D ΔE 0.039
- Peacock Blue #016795 ΔE 0.040
- Twilight #4E518B ΔE 0.045
- Mid Blue #276AB3 ΔE 0.047
Use #355D9B 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.