#3577F4
Closest named color: Clear Blue (#247AFD). oklch(59.7% 0.2 261.6), rgb(53, 119, 244).
Aa
Black text reads best on this color (5.09:1).
About this color
#3577F4 is a medium-dark, vivid blue. In OKLCH its lightness is 60%, its chroma 0.200 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Clear Blue (#247AFD), ΔE 0.016 away. Black text reads best on it, at 5.09:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | vivid (0.200) |
| Temperature | cool |
| Nearest name | Clear Blue (#247AFD) |
| Black text | 5.09:1 |
| White text | 4.12:1 |
Values
| HEX | #3577F4 |
| RGB | rgb(53, 119, 244) |
| HSL | hsl(219, 90%, 58%) |
| OKLCH | oklch(59.7% 0.2 261.6) |
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 #3577F4 | 4.12:1 | AA large text | Lc -73.3 | Content text, not long reading |
| Black text on #3577F4 | 5.09:1 | AA | Lc 36.3 | Non-text elements, placeholder text |
| #3577F4 text on white | 4.12:1 | AA large text | Lc 67.8 | Content text, not long reading |
| #3577F4 text on black | 5.09:1 | AA | Lc -33.9 | 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
#E0EAFD
oklch(93.5% 0.028 263.4)
-
Step 200
200
#C6DAFE
oklch(88.5% 0.054 262.2)
-
Step 300
300
#9EC1FF
oklch(80.8% 0.096 261.6)
-
Step 400
400
#6A9EFF
oklch(70.6% 0.153 261.9)
-
Step 500
500 (this color)
#3577F4
oklch(59.7% 0.2 261.6)
-
Step 600
600
#1F67EF
oklch(55.6% 0.217 261.7)
-
Step 700
700
#1154D0
oklch(49% 0.202 261.6)
-
Step 800
800
#1246A8
oklch(42.7% 0.167 261.6)
-
Step 900
900
#163C85
oklch(37.6% 0.13 261.7)
-
Step 950
950
#0E244E
oklch(27% 0.082 261.8)
#3577F4 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) | #2086F8 | 0.037 |
| Deuteranopia (no green cones) | #0075F2 | 0.023 |
| Tritanopia (no blue cones) | #0095AA | 0.155 |
| Achromatopsia (no color) | #7D7D7D | 0.200 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3577F4
#3577F4
oklch(59.7% 0.2 261.6)
- #A47600
#A47600
oklch(59.6% 0.123 81.3)
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 #3577F4, closest first.
No curated palette has a color within ΔE 0.04 of #3577F4.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Clear Blue #247AFD ΔE 0.016
- Cerulean Blue #056EEE ΔE 0.035
- Royal Blue #4169E1 ΔE 0.042
- Neon Blue #4361EE ΔE 0.051
- Bright Blue #0165FC ΔE 0.054
- Cornflower #6A79F7 ΔE 0.055
- Dodger Blue #1E90FF ΔE 0.062
- Azul #1D5DEC ΔE 0.068
Use #3577F4 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.