#648EEF
Closest named color: Soft Blue (#6488EA). oklch(66.1% 0.152 264.9), rgb(100, 142, 239).
Aa
Black text reads best on this color (6.65:1).
About this color
#648EEF is a medium-light, vivid blue. In OKLCH its lightness is 66%, its chroma 0.152 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Soft Blue (#6488EA), ΔE 0.016 away. Black text reads best on it, at 6.65:1.
| Hue family | Blues |
| Lightness | medium-light (66%) |
| Chroma | vivid (0.152) |
| Temperature | cool |
| Nearest name | Soft Blue (#6488EA) |
| Black text | 6.65:1 |
| White text | 3.15:1 |
Values
| HEX | #648EEF |
| RGB | rgb(100, 142, 239) |
| HSL | hsl(222, 81%, 66%) |
| OKLCH | oklch(66.1% 0.152 264.9) |
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 #648EEF | 3.15:1 | AA large text | Lc -63.8 | Content text, not long reading |
| Black text on #648EEF | 6.65:1 | AA | Lc 45.6 | Large or bold text, headings |
| #648EEF text on white | 3.15:1 | AA large text | Lc 58.4 | Large or bold text, headings |
| #648EEF text on black | 6.65:1 | AA | Lc -43.3 | 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
#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
#A9C1F2
oklch(81% 0.074 264.4)
-
Step 400
400
#7C9FEB
oklch(70.8% 0.119 264.7)
-
Step 500
500 (this color)
#648EEF
oklch(66.1% 0.152 264.9)
-
Step 600
600
#426CD3
oklch(55.6% 0.166 264.8)
-
Step 700
700
#3459B7
oklch(49% 0.155 265)
-
Step 800
800
#2C4A94
oklch(42.8% 0.127 264.9)
-
Step 900
900
#273E76
oklch(37.7% 0.1 265.2)
-
Step 950
950
#172545
oklch(27% 0.063 264.7)
#648EEF 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) | #6498F3 | 0.026 |
| Deuteranopia (no green cones) | #518BED | 0.022 |
| Tritanopia (no blue cones) | #00A4B3 | 0.134 |
| Achromatopsia (no color) | #919191 | 0.152 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #648EEF
#648EEF
oklch(66.1% 0.152 264.9)
- #B88A00
#B88A00
oklch(66% 0.135 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 #648EEF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Soft Blue #6488EA ΔE 0.016
- Cornflower Blue #6495ED ΔE 0.019
- Chefchaouen Blue #4895EF ΔE 0.029
- Dark Sky Blue #448EE4 ΔE 0.035
- Lavender Blue #8B88F8 ΔE 0.052
- Dodger Blue #1E90FF ΔE 0.052
- Perrywinkle #8F8CE7 ΔE 0.054
- Cornflower #6A79F7 ΔE 0.056
Use #648EEF 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.