#6388EA
Closest named color: Soft Blue (#6488EA). oklch(64.5% 0.153 266.6), rgb(99, 136, 234).
Aa
Black text reads best on this color (6.24:1).
About this color
#6388EA is a medium-light, vivid blue. In OKLCH its lightness is 65%, its chroma 0.153 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Soft Blue (#6488EA), ΔE 0.001 away. Black text reads best on it, at 6.24:1.
| Hue family | Blues |
| Lightness | medium-light (65%) |
| Chroma | vivid (0.153) |
| Temperature | cool |
| Nearest name | Soft Blue (#6488EA) |
| Black text | 6.24:1 |
| White text | 3.36:1 |
Values
| HEX | #6388EA |
| RGB | rgb(99, 136, 234) |
| HSL | hsl(224, 76%, 65%) |
| OKLCH | oklch(64.5% 0.153 266.6) |
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 #6388EA | 3.36:1 | AA large text | Lc -66.4 | Content text, not long reading |
| Black text on #6388EA | 6.24:1 | AA | Lc 43.2 | Non-text elements, placeholder text |
| #6388EA text on white | 3.36:1 | AA large text | Lc 60.9 | Content text, not long reading |
| #6388EA text on black | 6.24:1 | AA | Lc -40.8 | 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
#F2F5FC
oklch(97% 0.01 267.4)
-
Step 100
100
#E3EAF9
oklch(93.6% 0.022 265.8)
-
Step 200
200
#CDD9F5
oklch(88.5% 0.041 267.1)
-
Step 300
300
#ABC0F2
oklch(80.9% 0.075 267)
-
Step 400
400
#7E9EEB
oklch(70.7% 0.119 266.2)
-
Step 500
500 (this color)
#6388EA
oklch(64.5% 0.153 266.6)
-
Step 600
600
#476BD3
oklch(55.7% 0.165 266.7)
-
Step 700
700
#3858B7
oklch(49% 0.155 266.6)
-
Step 800
800
#2F4994
oklch(42.8% 0.127 266.6)
-
Step 900
900
#293E76
oklch(37.8% 0.099 266.3)
-
Step 950
950
#182545
oklch(27.1% 0.062 265.8)
#6388EA 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) | #5D92EE | 0.026 |
| Deuteranopia (no green cones) | #4B86E8 | 0.026 |
| Tritanopia (no blue cones) | #009EAE | 0.135 |
| Achromatopsia (no color) | #8C8C8C | 0.153 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6388EA
#6388EA
oklch(64.5% 0.153 266.6)
- #B18700
#B18700
oklch(64.6% 0.132 86.5)
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 #6388EA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Soft Blue #6488EA ΔE 0.001
- Dark Sky Blue #448EE4 ΔE 0.034
- Cornflower Blue #6495ED ΔE 0.034
- Chefchaouen Blue #4895EF ΔE 0.038
- Cornflower #6A79F7 ΔE 0.045
- Dodger Blue #1E90FF ΔE 0.055
- Lavender Blue #8B88F8 ΔE 0.056
- Perrywinkle #8F8CE7 ΔE 0.059
Use #6388EA 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.