#355AD3
Closest named color: Warm Blue (#4B57DB). oklch(51.4% 0.191 266.6), rgb(53, 90, 211).
Aa
White text reads best on this color (5.90:1).
About this color
#355AD3 is a medium-dark, vivid blue. In OKLCH its lightness is 51%, its chroma 0.191 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.028 away. White text reads best on it, at 5.90:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.191) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.55:1 |
| White text | 5.90:1 |
Values
| HEX | #355AD3 |
| RGB | rgb(53, 90, 211) |
| HSL | hsl(226, 64%, 52%) |
| OKLCH | oklch(51.4% 0.191 266.6) |
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 #355AD3 | 5.90:1 | AA | Lc -84.2 | Fine for body text |
| Black text on #355AD3 | 3.55:1 | AA large text | Lc 25.1 | Dividers and decoration only |
| #355AD3 text on white | 5.90:1 | AA | Lc 79.0 | Fine for body text |
| #355AD3 text on black | 3.55:1 | AA large text | Lc -22.8 | 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
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E2EAFC
oklch(93.6% 0.026 266.6)
-
Step 200
200
#CAD9FC
oklch(88.5% 0.051 267)
-
Step 300
300
#A5BFFD
oklch(80.8% 0.093 266.7)
-
Step 400
400
#769CFD
oklch(70.8% 0.148 266.5)
-
Step 500
500
#557FFA
oklch(63% 0.189 266.7)
-
Step 600
600
#3C65E9
oklch(55.6% 0.205 266.5)
-
Step 700
700 (this color)
#355AD3
oklch(51.4% 0.191 266.6)
-
Step 800
800
#2744A4
oklch(42.6% 0.159 266.7)
-
Step 900
900
#233B82
oklch(37.7% 0.123 266.4)
-
Step 950
950
#15234C
oklch(27% 0.078 266.9)
#355AD3 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) | #006CD7 | 0.046 |
| Deuteranopia (no green cones) | #005DD1 | 0.028 |
| Tritanopia (no blue cones) | #00788E | 0.150 |
| Achromatopsia (no color) | #646464 | 0.191 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #355AD3
#355AD3
oklch(51.4% 0.191 266.6)
- #826200
#826200
oklch(51.5% 0.105 86.2)
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 #355AD3, closest first.
No curated palette has a color within ΔE 0.04 of #355AD3.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.028
- Azul #1D5DEC ΔE 0.041
- Royal Blue #4169E1 ΔE 0.045
- Neon Blue #4361EE ΔE 0.048
- Iris #6258C4 ΔE 0.060
- Cerulean Blue #056EEE ΔE 0.062
- Blue Blue #2242C7 ΔE 0.065
- Dark Periwinkle #665FD1 ΔE 0.065
Use #355AD3 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.