#648DDC
Closest named color: Soft Blue (#6488EA). oklch(64.8% 0.127 262.6), rgb(100, 141, 220).
Aa
Black text reads best on this color (6.38:1).
About this color
#648DDC is a medium-light, moderately saturated blue. In OKLCH its lightness is 65%, its chroma 0.127 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Soft Blue (#6488EA), ΔE 0.027 away. Black text reads best on it, at 6.38:1.
| Hue family | Blues |
| Lightness | medium-light (65%) |
| Chroma | moderately saturated (0.127) |
| Temperature | cool |
| Nearest name | Soft Blue (#6488EA) |
| Black text | 6.38:1 |
| White text | 3.28:1 |
Values
| HEX | #648DDC |
| RGB | rgb(100, 141, 220) |
| HSL | hsl(219, 63%, 63%) |
| OKLCH | oklch(64.8% 0.127 262.6) |
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 #648DDC | 3.28:1 | AA large text | Lc -65.5 | Content text, not long reading |
| Black text on #648DDC | 6.38:1 | AA | Lc 44.0 | Non-text elements, placeholder text |
| #648DDC text on white | 3.28:1 | AA large text | Lc 60.1 | Content text, not long reading |
| #648DDC text on black | 6.38:1 | AA | Lc -41.6 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E3EAF6
oklch(93.5% 0.018 261.3)
-
Step 200
200
#CDDAF1
oklch(88.6% 0.035 262)
-
Step 300
300
#ABC1EA
oklch(80.8% 0.063 262.8)
-
Step 400
400
#7FA0DF
oklch(70.6% 0.1 262.8)
-
Step 500
500 (this color)
#648DDC
oklch(64.8% 0.127 262.6)
-
Step 600
600
#4670C3
oklch(55.6% 0.137 262.6)
-
Step 700
700
#375DA9
oklch(49% 0.129 262.6)
-
Step 800
800
#2E4D89
oklch(42.8% 0.106 262.3)
-
Step 900
900
#29406D
oklch(37.6% 0.083 262.6)
-
Step 950
950
#182640
oklch(27% 0.052 262)
#648DDC 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) | #6D94DF | 0.023 |
| Deuteranopia (no green cones) | #5E89DA | 0.014 |
| Tritanopia (no blue cones) | #1C9EAA | 0.114 |
| Achromatopsia (no color) | #8E8E8E | 0.127 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #648DDC
#648DDC
oklch(64.8% 0.127 262.6)
- #B48618
#B48618
oklch(64.8% 0.127 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 #648DDC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Soft Blue #6488EA ΔE 0.027
- Cornflower Blue #6495ED ΔE 0.030
- Dark Sky Blue #448EE4 ΔE 0.031
- Chefchaouen Blue #4895EF ΔE 0.037
- Faded Blue #658CBB ΔE 0.050
- Perrywinkle #8F8CE7 ΔE 0.058
- Cool Blue #4984B8 ΔE 0.066
- Dodger Blue #1E90FF ΔE 0.068
Use #648DDC 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.