#3974F3
Closest named color: Clear Blue (#247AFD). oklch(59.2% 0.201 263), rgb(57, 116, 243).
Aa
Black text reads best on this color (4.96:1).
About this color
#3974F3 is a medium-dark, vivid blue. In OKLCH its lightness is 59%, its chroma 0.201 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Clear Blue (#247AFD), ΔE 0.021 away. Black text reads best on it, at 4.96:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.201) |
| Temperature | cool |
| Nearest name | Clear Blue (#247AFD) |
| Black text | 4.96:1 |
| White text | 4.22:1 |
Values
| HEX | #3974F3 |
| RGB | rgb(57, 116, 243) |
| HSL | hsl(221, 89%, 59%) |
| OKLCH | oklch(59.2% 0.201 263) |
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 #3974F3 | 4.22:1 | AA large text | Lc -74.2 | Content text, not long reading |
| Black text on #3974F3 | 4.96:1 | AA | Lc 35.4 | Non-text elements, placeholder text |
| #3974F3 text on white | 4.22:1 | AA large text | Lc 68.7 | Content text, not long reading |
| #3974F3 text on black | 4.96:1 | AA | Lc -33.0 | 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 600.
-
Step 50
50
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E1EAFC
oklch(93.6% 0.026 264.4)
-
Step 200
200
#C8DAFB
oklch(88.5% 0.05 262.6)
-
Step 300
300
#A2C1FC
oklch(80.9% 0.091 263)
-
Step 400
400
#709EFA
oklch(70.7% 0.144 263.1)
-
Step 500
500
#4B83F8
oklch(63.2% 0.185 263)
-
Step 600
600 (this color)
#3974F3
oklch(59.2% 0.201 263)
-
Step 700
700
#2256C8
oklch(49.1% 0.186 262.9)
-
Step 800
800
#1D47A2
oklch(42.7% 0.155 262.9)
-
Step 900
900
#1D3D80
oklch(37.7% 0.12 262.8)
-
Step 950
950
#12244B
oklch(26.9% 0.076 263.5)
#3974F3 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) | #1384F7 | 0.040 |
| Deuteranopia (no green cones) | #0073F0 | 0.026 |
| Tritanopia (no blue cones) | #0093A8 | 0.158 |
| Achromatopsia (no color) | #7B7B7B | 0.201 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3974F3
#3974F3
oklch(59.2% 0.201 263)
- #A17600
#A17600
oklch(59.3% 0.122 83)
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 #3974F3, closest first.
No curated palette has a color within ΔE 0.04 of #3974F3.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Clear Blue #247AFD ΔE 0.021
- Cerulean Blue #056EEE ΔE 0.032
- Royal Blue #4169E1 ΔE 0.036
- Neon Blue #4361EE ΔE 0.044
- Bright Blue #0165FC ΔE 0.050
- Cornflower #6A79F7 ΔE 0.056
- Azul #1D5DEC ΔE 0.063
- Dodger Blue #1E90FF ΔE 0.070
Use #3974F3 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.