#638BEC
Closest named color: Soft Blue (#6488EA). oklch(65.3% 0.152 265.5), rgb(99, 139, 236).
Aa
Black text reads best on this color (6.43:1).
About this color
#638BEC is a medium-light, vivid blue. In OKLCH its lightness is 65%, its chroma 0.152 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Soft Blue (#6488EA), ΔE 0.008 away. Black text reads best on it, at 6.43:1.
| Hue family | Blues |
| Lightness | medium-light (65%) |
| Chroma | vivid (0.152) |
| Temperature | cool |
| Nearest name | Soft Blue (#6488EA) |
| Black text | 6.43:1 |
| White text | 3.26:1 |
Values
| HEX | #638BEC |
| RGB | rgb(99, 139, 236) |
| HSL | hsl(222, 78%, 66%) |
| OKLCH | oklch(65.3% 0.152 265.5) |
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 #638BEC | 3.26:1 | AA large text | Lc -65.2 | Content text, not long reading |
| Black text on #638BEC | 6.43:1 | AA | Lc 44.3 | Non-text elements, placeholder text |
| #638BEC text on white | 3.26:1 | AA large text | Lc 59.7 | Large or bold text, headings |
| #638BEC text on black | 6.43:1 | AA | Lc -42.0 | 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
#CCD9F5
oklch(88.4% 0.041 265.7)
-
Step 300
300
#AAC0F2
oklch(80.9% 0.075 266.2)
-
Step 400
400
#7D9EEB
oklch(70.6% 0.119 265.8)
-
Step 500
500 (this color)
#638BEC
oklch(65.3% 0.152 265.5)
-
Step 600
600
#446CD3
oklch(55.7% 0.165 265.4)
-
Step 700
700
#3659B6
oklch(49% 0.153 265.5)
-
Step 800
800
#2D4994
oklch(42.7% 0.128 265.8)
-
Step 900
900
#283E76
oklch(37.7% 0.1 265.7)
-
Step 950
950
#172545
oklch(27% 0.063 264.7)
#638BEC 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) | #6195F0 | 0.026 |
| Deuteranopia (no green cones) | #4E89EA | 0.023 |
| Tritanopia (no blue cones) | #00A1B0 | 0.134 |
| Achromatopsia (no color) | #8E8E8E | 0.152 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #638BEC
#638BEC
oklch(65.3% 0.152 265.5)
- #B58800
#B58800
oklch(65.2% 0.134 85)
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 #638BEC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Soft Blue #6488EA ΔE 0.008
- Cornflower Blue #6495ED ΔE 0.026
- Chefchaouen Blue #4895EF ΔE 0.033
- Dark Sky Blue #448EE4 ΔE 0.033
- Cornflower #6A79F7 ΔE 0.050
- Dodger Blue #1E90FF ΔE 0.053
- Lavender Blue #8B88F8 ΔE 0.054
- Perrywinkle #8F8CE7 ΔE 0.057
Use #638BEC 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.