#6388EE
Closest named color: Soft Blue (#6488EA). oklch(64.8% 0.158 267), rgb(99, 136, 238).
Aa
Black text reads best on this color (6.28:1).
About this color
#6388EE is a medium-light, vivid blue. In OKLCH its lightness is 65%, its chroma 0.158 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Soft Blue (#6488EA), ΔE 0.006 away. Black text reads best on it, at 6.28:1.
| Hue family | Blues |
| Lightness | medium-light (65%) |
| Chroma | vivid (0.158) |
| Temperature | cool |
| Nearest name | Soft Blue (#6488EA) |
| Black text | 6.28:1 |
| White text | 3.34:1 |
Values
| HEX | #6388EE |
| RGB | rgb(99, 136, 238) |
| HSL | hsl(224, 80%, 66%) |
| OKLCH | oklch(64.8% 0.158 267) |
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 #6388EE | 3.34:1 | AA large text | Lc -66.1 | Content text, not long reading |
| Black text on #6388EE | 6.28:1 | AA | Lc 43.5 | Non-text elements, placeholder text |
| #6388EE text on white | 3.34:1 | AA large text | Lc 60.6 | Content text, not long reading |
| #6388EE text on black | 6.28:1 | AA | Lc -41.1 | 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 500.
-
Step 50
50
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E3EAF9
oklch(93.6% 0.022 265.8)
-
Step 200
200
#CCD9F6
oklch(88.5% 0.042 266.3)
-
Step 300
300
#AAC0F4
oklch(80.9% 0.078 266.8)
-
Step 400
400
#7E9DEE
oklch(70.6% 0.124 267.3)
-
Step 500
500 (this color)
#6388EE
oklch(64.8% 0.158 267)
-
Step 600
600
#466AD6
oklch(55.6% 0.171 266.9)
-
Step 700
700
#3857BA
oklch(49% 0.16 267.2)
-
Step 800
800
#2E4896
oklch(42.6% 0.132 266.8)
-
Step 900
900
#293D78
oklch(37.7% 0.104 267.2)
-
Step 950
950
#182446
oklch(26.9% 0.065 267.3)
#6388EE 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) | #5A93F2 | 0.028 |
| Deuteranopia (no green cones) | #4787EC | 0.028 |
| Tritanopia (no blue cones) | #009FAF | 0.140 |
| Achromatopsia (no color) | #8D8D8D | 0.158 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6388EE
#6388EE
oklch(64.8% 0.158 267)
- #B18800
#B18800
oklch(64.8% 0.133 87.2)
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 #6388EE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Soft Blue #6488EA ΔE 0.006
- Cornflower Blue #6495ED ΔE 0.035
- Dark Sky Blue #448EE4 ΔE 0.037
- Chefchaouen Blue #4895EF ΔE 0.039
- Cornflower #6A79F7 ΔE 0.041
- Dodger Blue #1E90FF ΔE 0.053
- Lavender Blue #8B88F8 ΔE 0.054
- Perrywinkle #8F8CE7 ΔE 0.060
Use #6388EE 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.