#3979EC
Closest named color: Clear Blue (#247AFD). oklch(59.7% 0.186 261), rgb(57, 121, 236).
Aa
Black text reads best on this color (5.12:1).
About this color
#3979EC is a medium-dark, vivid blue. In OKLCH its lightness is 60%, its chroma 0.186 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Clear Blue (#247AFD), ΔE 0.027 away. Black text reads best on it, at 5.12:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | vivid (0.186) |
| Temperature | cool |
| Nearest name | Clear Blue (#247AFD) |
| Black text | 5.12:1 |
| White text | 4.10:1 |
Values
| HEX | #3979EC |
| RGB | rgb(57, 121, 236) |
| HSL | hsl(219, 82%, 57%) |
| OKLCH | oklch(59.7% 0.186 261) |
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 #3979EC | 4.10:1 | AA large text | Lc -73.2 | Content text, not long reading |
| Black text on #3979EC | 5.12:1 | AA | Lc 36.4 | Non-text elements, placeholder text |
| #3979EC text on white | 4.10:1 | AA large text | Lc 67.7 | Content text, not long reading |
| #3979EC text on black | 5.12:1 | AA | Lc -34.0 | 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 500.
-
Step 50
50
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E0EBFC
oklch(93.7% 0.026 259)
-
Step 200
200
#C7DAFB
oklch(88.5% 0.05 261.5)
-
Step 300
300
#A0C2FC
oklch(81% 0.09 260.9)
-
Step 400
400
#6B9FFB
oklch(70.7% 0.146 261.1)
-
Step 500
500 (this color)
#3979EC
oklch(59.7% 0.186 261)
-
Step 600
600
#246AE7
oklch(55.6% 0.202 261)
-
Step 700
700
#1757C9
oklch(49.1% 0.189 261.1)
-
Step 800
800
#1548A2
oklch(42.6% 0.156 260.9)
-
Step 900
900
#183E81
oklch(37.8% 0.121 260.8)
-
Step 950
950
#0F254B
oklch(27% 0.076 260.5)
#3979EC 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) | #3586F0 | 0.033 |
| Deuteranopia (no green cones) | #0076EA | 0.027 |
| Tritanopia (no blue cones) | #0095A7 | 0.146 |
| Achromatopsia (no color) | #7D7D7D | 0.186 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3979EC
#3979EC
oklch(59.7% 0.186 261)
- #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 #3979EC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Clear Blue #247AFD ΔE 0.027
- Cerulean Blue #056EEE ΔE 0.041
- Royal Blue #4169E1 ΔE 0.041
- Cornflower #6A79F7 ΔE 0.054
- Neon Blue #4361EE ΔE 0.057
- Dark Sky Blue #448EE4 ΔE 0.061
- Dodger Blue #1E90FF ΔE 0.061
- Soft Blue #6488EA ΔE 0.062
Use #3979EC 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.