#638EE2
Closest named color: Soft Blue (#6488EA). oklch(65.3% 0.135 262.7), rgb(99, 142, 226).
Aa
Black text reads best on this color (6.49:1).
About this color
#638EE2 is a medium-light, moderately saturated blue. In OKLCH its lightness is 65%, its chroma 0.135 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Soft Blue (#6488EA), ΔE 0.022 away. Black text reads best on it, at 6.49:1.
| Hue family | Blues |
| Lightness | medium-light (65%) |
| Chroma | moderately saturated (0.135) |
| Temperature | cool |
| Nearest name | Soft Blue (#6488EA) |
| Black text | 6.49:1 |
| White text | 3.23:1 |
Values
| HEX | #638EE2 |
| RGB | rgb(99, 142, 226) |
| HSL | hsl(220, 69%, 64%) |
| OKLCH | oklch(65.3% 0.135 262.7) |
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 #638EE2 | 3.23:1 | AA large text | Lc -64.8 | Content text, not long reading |
| Black text on #638EE2 | 6.49:1 | AA | Lc 44.7 | Non-text elements, placeholder text |
| #638EE2 text on white | 3.23:1 | AA large text | Lc 59.4 | Large or bold text, headings |
| #638EE2 text on black | 6.49:1 | AA | Lc -42.3 | 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E3EAF7
oklch(93.6% 0.019 263)
-
Step 200
200
#CCDAF2
oklch(88.5% 0.036 261.3)
-
Step 300
300
#AAC1EC
oklch(80.8% 0.066 262.8)
-
Step 400
400
#7DA0E3
oklch(70.7% 0.106 262.8)
-
Step 500
500 (this color)
#638EE2
oklch(65.3% 0.135 262.7)
-
Step 600
600
#436FC8
oklch(55.6% 0.147 262.8)
-
Step 700
700
#355DAD
oklch(49.2% 0.136 262.5)
-
Step 800
800
#2C4C8C
oklch(42.7% 0.113 262.6)
-
Step 900
900
#284070
oklch(37.8% 0.088 262.8)
-
Step 950
950
#172641
oklch(27% 0.055 261.4)
#638EE2 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) | #6B95E5 | 0.022 |
| Deuteranopia (no green cones) | #5B8AE0 | 0.015 |
| Tritanopia (no blue cones) | #00A1AD | 0.122 |
| Achromatopsia (no color) | #8F8F8F | 0.135 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #638EE2
#638EE2
oklch(65.3% 0.135 262.7)
- #B88700
#B88700
oklch(65.4% 0.134 82.8)
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 #638EE2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Soft Blue #6488EA ΔE 0.022
- Cornflower Blue #6495ED ΔE 0.023
- Dark Sky Blue #448EE4 ΔE 0.029
- Chefchaouen Blue #4895EF ΔE 0.031
- Perrywinkle #8F8CE7 ΔE 0.056
- Faded Blue #658CBB ΔE 0.059
- Dodger Blue #1E90FF ΔE 0.061
- Lavender Blue #8B88F8 ΔE 0.063
Use #638EE2 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.