#355FD0
Closest named color: Warm Blue (#4B57DB). oklch(52.2% 0.181 265.2), rgb(53, 95, 208).
Aa
White text reads best on this color (5.67:1).
About this color
#355FD0 is a medium-dark, vivid blue. In OKLCH its lightness is 52%, its chroma 0.181 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.033 away. White text reads best on it, at 5.67:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.181) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.69:1 |
| White text | 5.67:1 |
Values
| HEX | #355FD0 |
| RGB | rgb(53, 95, 208) |
| HSL | hsl(224, 62%, 51%) |
| OKLCH | oklch(52.2% 0.181 265.2) |
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 #355FD0 | 5.67:1 | AA | Lc -83.2 | Fine for body text |
| Black text on #355FD0 | 3.69:1 | AA large text | Lc 26.2 | Dividers and decoration only |
| #355FD0 text on white | 5.67:1 | AA | Lc 77.9 | Fine for body text |
| #355FD0 text on black | 3.69:1 | AA large text | Lc -23.9 | 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
#E2EAFB
oklch(93.6% 0.025 265.6)
-
Step 200
200
#CAD9FA
oklch(88.5% 0.048 266)
-
Step 300
300
#A5C0FA
oklch(80.9% 0.088 265.1)
-
Step 400
400
#769DF8
oklch(70.7% 0.141 265.4)
-
Step 500
500
#5382F4
oklch(63.1% 0.178 264.9)
-
Step 600
600
#3A68E3
oklch(55.6% 0.194 265.1)
-
Step 700
700 (this color)
#355FD0
oklch(52.2% 0.181 265.2)
-
Step 800
800
#2647A0
oklch(42.8% 0.15 265.2)
-
Step 900
900
#223C7F
oklch(37.6% 0.118 265.2)
-
Step 950
950
#14244A
oklch(27% 0.074 264.7)
#355FD0 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) | #006ED4 | 0.040 |
| Deuteranopia (no green cones) | #0060CE | 0.027 |
| Tritanopia (no blue cones) | #007B8E | 0.144 |
| Achromatopsia (no color) | #676767 | 0.181 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #355FD0
#355FD0
oklch(52.2% 0.181 265.2)
- #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 #355FD0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.033
- Royal Blue #4169E1 ΔE 0.039
- Azul #1D5DEC ΔE 0.046
- Neon Blue #4361EE ΔE 0.049
- Cerulean Blue #056EEE ΔE 0.057
- Mid Blue #276AB3 ΔE 0.058
- Iris #6258C4 ΔE 0.058
- Dark Periwinkle #665FD1 ΔE 0.061
Use #355FD0 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.