#3773FE
Closest named color: Clear Blue (#247AFD). oklch(59.7% 0.217 263.6), rgb(55, 115, 254).
Aa
Black text reads best on this color (5.04:1).
About this color
#3773FE is a medium-dark, vivid blue. In OKLCH its lightness is 60%, its chroma 0.217 and its hue 264°. 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 5.04:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | vivid (0.217) |
| Temperature | cool |
| Nearest name | Clear Blue (#247AFD) |
| Black text | 5.04:1 |
| White text | 4.16:1 |
Values
| HEX | #3773FE |
| RGB | rgb(55, 115, 254) |
| HSL | hsl(222, 99%, 61%) |
| OKLCH | oklch(59.7% 0.217 263.6) |
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 #3773FE | 4.16:1 | AA large text | Lc -73.5 | Content text, not long reading |
| Black text on #3773FE | 5.04:1 | AA | Lc 36.0 | Non-text elements, placeholder text |
| #3773FE text on white | 4.16:1 | AA large text | Lc 68.0 | Content text, not long reading |
| #3773FE text on black | 5.04:1 | AA | Lc -33.6 | 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
#A1C1FF
oklch(81% 0.095 263.3)
-
Step 400
400
#6E9DFF
oklch(70.6% 0.153 263.6)
-
Step 500
500 (this color)
#3773FE
oklch(59.7% 0.217 263.6)
-
Step 600
600
#2362FA
oklch(55.7% 0.235 263.5)
-
Step 700
700
#174FDA
oklch(49% 0.22 263.6)
-
Step 800
800
#1542B0
oklch(42.7% 0.182 263.6)
-
Step 900
900
#173A8B
oklch(37.7% 0.141 263.5)
-
Step 950
950
#0E2351
oklch(27% 0.089 263.2)
#3773FE 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) | #0086FF | 0.046 |
| Deuteranopia (no green cones) | #0073FB | 0.023 |
| Tritanopia (no blue cones) | #0096AD | 0.170 |
| Achromatopsia (no color) | #7C7C7C | 0.217 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3773FE
#3773FE
oklch(59.7% 0.217 263.6)
- #A27800
#A27800
oklch(59.8% 0.123 84)
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 #3773FE, closest first.
No curated palette has a color within ΔE 0.04 of #3773FE.
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 0.038
- Bright Blue #0165FC ΔE 0.045
- Neon Blue #4361EE ΔE 0.046
- Royal Blue #4169E1 ΔE 0.048
- Cornflower #6A79F7 ΔE 0.058
- Azul #1D5DEC ΔE 0.064
- Dodger Blue #1E90FF ΔE 0.071
Use #3773FE 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.