#337AE6
Closest named color: Clear Blue (#247AFD). oklch(59.3% 0.179 258.9), rgb(51, 122, 230).
Aa
Black text reads best on this color (5.06:1).
About this color
#337AE6 is a medium-dark, vivid blue. In OKLCH its lightness is 59%, its chroma 0.179 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Clear Blue (#247AFD), ΔE 0.035 away. Black text reads best on it, at 5.06:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.179) |
| Temperature | cool |
| Nearest name | Clear Blue (#247AFD) |
| Black text | 5.06:1 |
| White text | 4.14:1 |
Values
| HEX | #337AE6 |
| RGB | rgb(51, 122, 230) |
| HSL | hsl(216, 78%, 55%) |
| OKLCH | oklch(59.3% 0.179 258.9) |
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 #337AE6 | 4.14:1 | AA large text | Lc -73.5 | Content text, not long reading |
| Black text on #337AE6 | 5.06:1 | AA | Lc 36.0 | Non-text elements, placeholder text |
| #337AE6 text on white | 4.14:1 | AA large text | Lc 68.0 | Content text, not long reading |
| #337AE6 text on black | 5.06:1 | 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 600.
-
Step 50
50
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E1EBFA
oklch(93.7% 0.023 258.4)
-
Step 200
200
#C8DAF7
oklch(88.4% 0.045 259.9)
-
Step 300
300
#A1C2F5
oklch(80.8% 0.081 259)
-
Step 400
400
#6EA1F0
oklch(70.7% 0.129 258.9)
-
Step 500
500
#4787EB
oklch(63.1% 0.165 259.1)
-
Step 600
600 (this color)
#337AE6
oklch(59.3% 0.179 258.9)
-
Step 700
700
#195CBD
oklch(49.2% 0.166 258.8)
-
Step 800
800
#184B98
oklch(42.6% 0.137 259)
-
Step 900
900
#1A4079
oklch(37.7% 0.106 258.6)
-
Step 950
950
#102647
oklch(27% 0.068 258.4)
#337AE6 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) | #3E85EA | 0.032 |
| Deuteranopia (no green cones) | #0075E4 | 0.026 |
| Tritanopia (no blue cones) | #0094A5 | 0.138 |
| Achromatopsia (no color) | #7D7D7D | 0.179 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #337AE6
#337AE6
oklch(59.3% 0.179 258.9)
- #A57400
#A57400
oklch(59.4% 0.123 79.2)
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 #337AE6, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Clear Blue #247AFD ΔE 0.035
- Cerulean Blue #056EEE ΔE 0.042
- Royal Blue #4169E1 ΔE 0.042
- Dark Sky Blue #448EE4 ΔE 0.058
- Water Blue #0E87CC ΔE 0.059
- Windows Blue #3778BF ΔE 0.059
- Cornflower #6A79F7 ΔE 0.062
- Neon Blue #4361EE ΔE 0.062
Use #337AE6 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.