#3573FD
Closest named color: Clear Blue (#247AFD). oklch(59.6% 0.216 263.2), rgb(53, 115, 253).
Aa
Black text reads best on this color (5.02:1).
About this color
#3573FD is a medium-dark, vivid blue. In OKLCH its lightness is 60%, its chroma 0.216 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Clear Blue (#247AFD), ΔE 0.018 away. Black text reads best on it, at 5.02:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | vivid (0.216) |
| Temperature | cool |
| Nearest name | Clear Blue (#247AFD) |
| Black text | 5.02:1 |
| White text | 4.18:1 |
Values
| HEX | #3573FD |
| RGB | rgb(53, 115, 253) |
| HSL | hsl(221, 98%, 60%) |
| OKLCH | oklch(59.6% 0.216 263.2) |
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 #3573FD | 4.18:1 | AA large text | Lc -73.7 | Content text, not long reading |
| Black text on #3573FD | 5.02:1 | AA | Lc 35.9 | Non-text elements, placeholder text |
| #3573FD text on white | 4.18:1 | AA large text | Lc 68.2 | Content text, not long reading |
| #3573FD text on black | 5.02:1 | AA | Lc -33.5 | Non-text elements, placeholder text |
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 500.
-
Step 50
50
#F1F6FF
oklch(97.2% 0.013 262.4)
-
Step 100
100
#DFEAFF
oklch(93.5% 0.031 263.5)
-
Step 200
200
#C6DAFF
oklch(88.5% 0.056 262.8)
-
Step 300
300
#A0C1FF
oklch(80.9% 0.095 262.7)
-
Step 400
400
#6D9DFF
oklch(70.6% 0.153 263.3)
-
Step 500
500 (this color)
#3573FD
oklch(59.6% 0.216 263.2)
-
Step 600
600
#2162F9
oklch(55.5% 0.235 263.2)
-
Step 700
700
#1550D9
oklch(49.1% 0.217 263.2)
-
Step 800
800
#1343B0
oklch(42.8% 0.181 263.1)
-
Step 900
900
#163A8B
oklch(37.7% 0.141 263.2)
-
Step 950
950
#0E2351
oklch(27% 0.089 263.2)
#3573FD 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) | #0085FF | 0.044 |
| Deuteranopia (no green cones) | #0073FA | 0.022 |
| Tritanopia (no blue cones) | #0095AD | 0.167 |
| Achromatopsia (no color) | #7C7C7C | 0.216 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3573FD
#3573FD
oklch(59.6% 0.216 263.2)
- #A27700
#A27700
oklch(59.6% 0.123 83.2)
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 #3573FD, closest first.
No curated palette has a color within ΔE 0.04 of #3573FD.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Clear Blue #247AFD ΔE 0.018
- Cerulean Blue #056EEE ΔE 0.036
- Bright Blue #0165FC ΔE 0.044
- Neon Blue #4361EE ΔE 0.046
- Royal Blue #4169E1 ΔE 0.047
- Cornflower #6A79F7 ΔE 0.059
- Azul #1D5DEC ΔE 0.063
- Dodger Blue #1E90FF ΔE 0.071
Use #3573FD 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.