#355CD8
Closest named color: Warm Blue (#4B57DB). oklch(52.2% 0.195 266.3), rgb(53, 92, 216).
Aa
White text reads best on this color (5.71:1).
About this color
#355CD8 is a medium-dark, vivid blue. In OKLCH its lightness is 52%, its chroma 0.195 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.025 away. White text reads best on it, at 5.71:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.195) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.67:1 |
| White text | 5.71:1 |
Values
| HEX | #355CD8 |
| RGB | rgb(53, 92, 216) |
| HSL | hsl(226, 68%, 53%) |
| OKLCH | oklch(52.2% 0.195 266.3) |
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 #355CD8 | 5.71:1 | AA | Lc -83.3 | Fine for body text |
| Black text on #355CD8 | 3.67:1 | AA large text | Lc 26.0 | Dividers and decoration only |
| #355CD8 text on white | 5.71:1 | AA | Lc 78.0 | Fine for body text |
| #355CD8 text on black | 3.67:1 | AA large text | Lc -23.8 | 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
#F1F5FE
oklch(97% 0.013 266.7)
-
Step 100
100
#E1EAFD
oklch(93.6% 0.028 265.4)
-
Step 200
200
#C9D9FD
oklch(88.5% 0.053 266.4)
-
Step 300
300
#A4BFFF
oklch(80.8% 0.096 266.6)
-
Step 400
400
#759CFE
oklch(70.8% 0.15 266.3)
-
Step 500
500
#537FFD
oklch(63.1% 0.194 266.4)
-
Step 600
600
#3A64EC
oklch(55.6% 0.21 266.4)
-
Step 700
700 (this color)
#355CD8
oklch(52.2% 0.195 266.3)
-
Step 800
800
#2644A6
oklch(42.7% 0.162 266.4)
-
Step 900
900
#223B83
oklch(37.7% 0.125 266.1)
-
Step 950
950
#14234D
oklch(27% 0.08 266.3)
#355CD8 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) | #006EDC | 0.046 |
| Deuteranopia (no green cones) | #005FD6 | 0.027 |
| Tritanopia (no blue cones) | #007B91 | 0.154 |
| Achromatopsia (no color) | #666666 | 0.196 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #355CD8
#355CD8
oklch(52.2% 0.195 266.3)
- #856400
#856400
oklch(52.2% 0.107 85.9)
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 #355CD8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.025
- Azul #1D5DEC ΔE 0.034
- Royal Blue #4169E1 ΔE 0.038
- Neon Blue #4361EE ΔE 0.040
- Cerulean Blue #056EEE ΔE 0.054
- Bright Blue #0165FC ΔE 0.060
- Iris #6258C4 ΔE 0.063
- Dark Periwinkle #665FD1 ΔE 0.063
Use #355CD8 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.