#5B6BF4
Closest named color: Neon Blue (#4361EE). oklch(59.1% 0.204 273.4), rgb(91, 107, 244).
Aa
Black text reads best on this color (4.85:1).
About this color
#5B6BF4 is a medium-dark, vivid blue. In OKLCH its lightness is 59%, its chroma 0.204 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Neon Blue (#4361EE), ΔE 0.040 away. Black text reads best on it, at 4.85:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.204) |
| Temperature | cool |
| Nearest name | Neon Blue (#4361EE) |
| Black text | 4.85:1 |
| White text | 4.32:1 |
Values
| HEX | #5B6BF4 |
| RGB | rgb(91, 107, 244) |
| HSL | hsl(234, 87%, 66%) |
| OKLCH | oklch(59.1% 0.204 273.4) |
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 #5B6BF4 | 4.32:1 | AA large text | Lc -75.0 | Fine for body text |
| Black text on #5B6BF4 | 4.85:1 | AA | Lc 34.6 | Non-text elements, placeholder text |
| #5B6BF4 text on white | 4.32:1 | AA large text | Lc 69.5 | Content text, not long reading |
| #5B6BF4 text on black | 4.85:1 | AA | Lc -32.1 | 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
#F3F5FE
oklch(97.1% 0.012 276.1)
-
Step 100
100
#E4E9FC
oklch(93.6% 0.026 274.1)
-
Step 200
200
#CED8FC
oklch(88.6% 0.051 273.1)
-
Step 300
300
#ADBDFC
oklch(80.9% 0.091 273.2)
-
Step 400
400
#8498FB
oklch(70.7% 0.146 273.5)
-
Step 500
500
#687BF9
oklch(63.2% 0.187 273.4)
-
Step 600
600 (this color)
#5B6BF4
oklch(59.1% 0.204 273.4)
-
Step 700
700
#434EC9
oklch(49.1% 0.189 273.3)
-
Step 800
800
#3741A3
oklch(42.8% 0.157 273.4)
-
Step 900
900
#2F3881
oklch(37.7% 0.122 273.7)
-
Step 950
950
#1B224C
oklch(27.1% 0.078 273)
#5B6BF4 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) | #0080F9 | 0.067 |
| Deuteranopia (no green cones) | #0073F1 | 0.059 |
| Tritanopia (no blue cones) | #008CA5 | 0.171 |
| Achromatopsia (no color) | #797979 | 0.204 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B6BF4
#5B6BF4
oklch(59.1% 0.204 273.4)
- #967B00
#967B00
oklch(59.1% 0.121 93.5)
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 #5B6BF4, closest first.
No curated palette has a color within ΔE 0.04 of #5B6BF4.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Neon Blue #4361EE ΔE 0.040
- Cornflower #6A79F7 ΔE 0.041
- Royal Blue #4169E1 ΔE 0.043
- Medium Slate Blue #7B68EE ΔE 0.045
- Clear Blue #247AFD ΔE 0.053
- Dark Periwinkle #665FD1 ΔE 0.059
- Cerulean Blue #056EEE ΔE 0.060
- Warm Blue #4B57DB ΔE 0.065
Use #5B6BF4 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.