#3975EB
Closest named color: Clear Blue (#247AFD). oklch(58.8% 0.189 262.1), rgb(57, 117, 235).
Aa
Black text reads best on this color (4.91:1).
About this color
#3975EB is a medium-dark, vivid blue. In OKLCH its lightness is 59%, its chroma 0.189 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Clear Blue (#247AFD), ΔE 0.030 away. Black text reads best on it, at 4.91:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.189) |
| Temperature | cool |
| Nearest name | Clear Blue (#247AFD) |
| Black text | 4.91:1 |
| White text | 4.26:1 |
Values
| HEX | #3975EB |
| RGB | rgb(57, 117, 235) |
| HSL | hsl(220, 82%, 57%) |
| OKLCH | oklch(58.8% 0.189 262.1) |
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 #3975EB | 4.26:1 | AA large text | Lc -74.5 | Content text, not long reading |
| Black text on #3975EB | 4.91:1 | AA | Lc 35.1 | Non-text elements, placeholder text |
| #3975EB text on white | 4.26:1 | AA large text | Lc 69.0 | Content text, not long reading |
| #3975EB text on black | 4.91:1 | AA | Lc -32.6 | 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 600.
-
Step 50
50
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E1EAFB
oklch(93.5% 0.025 263.3)
-
Step 200
200
#C8DAF9
oklch(88.5% 0.047 261.4)
-
Step 300
300
#A3C1F8
oklch(80.8% 0.085 262.3)
-
Step 400
400
#719FF5
oklch(70.7% 0.136 262.1)
-
Step 500
500
#4C84F1
oklch(63% 0.174 262.2)
-
Step 600
600 (this color)
#3975EB
oklch(58.8% 0.189 262.1)
-
Step 700
700
#2358C2
oklch(49% 0.176 262.1)
-
Step 800
800
#1E499D
oklch(42.7% 0.145 261.9)
-
Step 900
900
#1E3E7D
oklch(37.7% 0.114 262.2)
-
Step 950
950
#122549
oklch(27% 0.071 261.9)
#3975EB 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) | #2A83EF | 0.035 |
| Deuteranopia (no green cones) | #0073E9 | 0.027 |
| Tritanopia (no blue cones) | #0091A5 | 0.147 |
| Achromatopsia (no color) | #7A7A7A | 0.190 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3975EB
#3975EB
oklch(58.8% 0.189 262.1)
- #A07400
#A07400
oklch(58.8% 0.121 82)
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 #3975EB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Clear Blue #247AFD ΔE 0.030
- Royal Blue #4169E1 ΔE 0.032
- Cerulean Blue #056EEE ΔE 0.033
- Neon Blue #4361EE ΔE 0.047
- Bright Blue #0165FC ΔE 0.057
- Cornflower #6A79F7 ΔE 0.058
- Azul #1D5DEC ΔE 0.065
- Windows Blue #3778BF ΔE 0.070
Use #3975EB 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.