#6388DA
Closest named color: Soft Blue (#6488EA). oklch(63.6% 0.131 264.6), rgb(99, 136, 218).
Aa
Black text reads best on this color (6.06:1).
About this color
#6388DA is a medium-light, moderately saturated blue. In OKLCH its lightness is 64%, its chroma 0.131 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Soft Blue (#6488EA), ΔE 0.024 away. Black text reads best on it, at 6.06:1.
| Hue family | Blues |
| Lightness | medium-light (64%) |
| Chroma | moderately saturated (0.131) |
| Temperature | cool |
| Nearest name | Soft Blue (#6488EA) |
| Black text | 6.06:1 |
| White text | 3.46:1 |
Values
| HEX | #6388DA |
| RGB | rgb(99, 136, 218) |
| HSL | hsl(221, 62%, 62%) |
| OKLCH | oklch(63.6% 0.131 264.6) |
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 #6388DA | 3.46:1 | AA large text | Lc -67.5 | Content text, not long reading |
| Black text on #6388DA | 6.06:1 | AA | Lc 42.1 | Non-text elements, placeholder text |
| #6388DA text on white | 3.46:1 | AA large text | Lc 62.0 | Content text, not long reading |
| #6388DA text on black | 6.06:1 | AA | Lc -39.7 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E4EAF7
oklch(93.6% 0.019 266)
-
Step 200
200
#CED9F1
oklch(88.4% 0.035 266)
-
Step 300
300
#ACC1EB
oklch(80.9% 0.064 264.1)
-
Step 400
400
#81A0E1
oklch(70.8% 0.102 264.4)
-
Step 500
500 (this color)
#6388DA
oklch(63.6% 0.131 264.6)
-
Step 600
600
#496FC6
oklch(55.7% 0.142 264.5)
-
Step 700
700
#3A5CAB
oklch(49.1% 0.132 264.5)
-
Step 800
800
#304C8A
oklch(42.8% 0.108 264.1)
-
Step 900
900
#2B3F6F
oklch(37.6% 0.086 265.4)
-
Step 950
950
#192541
oklch(26.9% 0.055 265.3)
#6388DA 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) | #6790DD | 0.022 |
| Deuteranopia (no green cones) | #5885D8 | 0.016 |
| Tritanopia (no blue cones) | #1D9AA6 | 0.118 |
| Achromatopsia (no color) | #8A8A8A | 0.131 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6388DA
#6388DA
oklch(63.6% 0.131 264.6)
- #AF8300
#AF8300
oklch(63.6% 0.13 84.8)
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 #6388DA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Soft Blue #6488EA ΔE 0.024
- Dark Sky Blue #448EE4 ΔE 0.032
- Cornflower Blue #6495ED ΔE 0.041
- Chefchaouen Blue #4895EF ΔE 0.045
- Faded Blue #658CBB ΔE 0.051
- Cool Blue #4984B8 ΔE 0.061
- Perrywinkle #8F8CE7 ΔE 0.063
- Cornflower #6A79F7 ΔE 0.063
Use #6388DA 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.