#648CFF
Closest named color: Soft Blue (#6488EA). oklch(66.7% 0.176 267.1), rgb(100, 140, 255).
Aa
Black text reads best on this color (6.73:1).
About this color
#648CFF is a medium-light, vivid blue. In OKLCH its lightness is 67%, its chroma 0.176 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Soft Blue (#6488EA), ΔE 0.031 away. Black text reads best on it, at 6.73:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | vivid (0.176) |
| Temperature | cool |
| Nearest name | Soft Blue (#6488EA) |
| Black text | 6.73:1 |
| White text | 3.11:1 |
Values
| HEX | #648CFF |
| RGB | rgb(100, 140, 255) |
| HSL | hsl(225, 100%, 70%) |
| OKLCH | oklch(66.7% 0.176 267.1) |
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 #648CFF | 3.11:1 | AA large text | Lc -63.3 | Content text, not long reading |
| Black text on #648CFF | 6.73:1 | AA | Lc 46.1 | Large or bold text, headings |
| #648CFF text on white | 3.11:1 | AA large text | Lc 57.9 | Large or bold text, headings |
| #648CFF text on black | 6.73:1 | AA | Lc -43.8 | 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
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E2EAFB
oklch(93.6% 0.025 265.6)
-
Step 200
200
#CBD9FA
oklch(88.5% 0.048 267.2)
-
Step 300
300
#A8BFF9
oklch(80.8% 0.086 267.7)
-
Step 400
400
#7A9CF6
oklch(70.6% 0.138 267.2)
-
Step 500
500 (this color)
#648CFF
oklch(66.7% 0.176 267.1)
-
Step 600
600
#4267E1
oklch(55.6% 0.19 267.2)
-
Step 700
700
#3455C4
oklch(49.2% 0.178 267)
-
Step 800
800
#2B469E
oklch(42.7% 0.147 267)
-
Step 900
900
#263C7E
oklch(37.7% 0.115 266.9)
-
Step 950
950
#17244A
oklch(27.2% 0.073 267.3)
#648CFF 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) | #5599FF | 0.034 |
| Deuteranopia (no green cones) | #3C8BFD | 0.037 |
| Tritanopia (no blue cones) | #00A6B9 | 0.151 |
| Achromatopsia (no color) | #929292 | 0.176 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #648CFF
#648CFF
oklch(66.7% 0.176 267.1)
- #B88D00
#B88D00
oklch(66.6% 0.136 86.8)
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 #648CFF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Soft Blue #6488EA ΔE 0.031
- Cornflower Blue #6495ED ΔE 0.039
- Chefchaouen Blue #4895EF ΔE 0.043
- Cornflower #6A79F7 ΔE 0.046
- Lavender Blue #8B88F8 ΔE 0.049
- Dodger Blue #1E90FF ΔE 0.049
- Dark Sky Blue #448EE4 ΔE 0.053
- Periwinkle #8E82FE ΔE 0.055
Use #648CFF 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.