#6388EB
Closest named color: Soft Blue (#6488EA). oklch(64.6% 0.154 266.7), rgb(99, 136, 235).
Aa
Black text reads best on this color (6.25:1).
About this color
#6388EB is a medium-light, vivid blue. In OKLCH its lightness is 65%, its chroma 0.154 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Soft Blue (#6488EA), ΔE 0.002 away. Black text reads best on it, at 6.25:1.
| Hue family | Blues |
| Lightness | medium-light (65%) |
| Chroma | vivid (0.154) |
| Temperature | cool |
| Nearest name | Soft Blue (#6488EA) |
| Black text | 6.25:1 |
| White text | 3.35:1 |
Values
| HEX | #6388EB |
| RGB | rgb(99, 136, 235) |
| HSL | hsl(224, 77%, 65%) |
| OKLCH | oklch(64.6% 0.154 266.7) |
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 #6388EB | 3.35:1 | AA large text | Lc -66.3 | Content text, not long reading |
| Black text on #6388EB | 6.25:1 | AA | Lc 43.2 | Non-text elements, placeholder text |
| #6388EB text on white | 3.35:1 | AA large text | Lc 60.8 | Content text, not long reading |
| #6388EB text on black | 6.25:1 | AA | Lc -40.9 | 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
#CDD9F6
oklch(88.5% 0.042 267.7)
-
Step 300
300
#AAC0F2
oklch(80.9% 0.075 266.2)
-
Step 400
400
#7E9EEC
oklch(70.8% 0.12 266.4)
-
Step 500
500 (this color)
#6388EB
oklch(64.6% 0.154 266.7)
-
Step 600
600
#466BD4
oklch(55.7% 0.167 266.4)
-
Step 700
700
#3858B8
oklch(49.1% 0.156 266.7)
-
Step 800
800
#2F4995
oklch(42.8% 0.129 266.7)
-
Step 900
900
#293E76
oklch(37.8% 0.099 266.3)
-
Step 950
950
#182445
oklch(26.9% 0.064 267)
#6388EB 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) | #5C93EF | 0.028 |
| Deuteranopia (no green cones) | #4A86E9 | 0.027 |
| Tritanopia (no blue cones) | #009EAE | 0.136 |
| Achromatopsia (no color) | #8C8C8C | 0.154 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6388EB
#6388EB
oklch(64.6% 0.154 266.7)
- #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 #6388EB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Soft Blue #6488EA ΔE 0.002
- Cornflower Blue #6495ED ΔE 0.034
- Dark Sky Blue #448EE4 ΔE 0.034
- Chefchaouen Blue #4895EF ΔE 0.038
- Cornflower #6A79F7 ΔE 0.044
- Dodger Blue #1E90FF ΔE 0.054
- Lavender Blue #8B88F8 ΔE 0.055
- Perrywinkle #8F8CE7 ΔE 0.059
Use #6388EB 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.