#648FD1
Closest named color: Faded Blue (#658CBB). oklch(64.7% 0.11 258.7), rgb(100, 143, 209).
Aa
Black text reads best on this color (6.39:1).
About this color
#648FD1 is a medium-light, moderately saturated blue. In OKLCH its lightness is 65%, its chroma 0.110 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.033 away. Black text reads best on it, at 6.39:1.
| Hue family | Blues |
| Lightness | medium-light (65%) |
| Chroma | moderately saturated (0.110) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.39:1 |
| White text | 3.28:1 |
Values
| HEX | #648FD1 |
| RGB | rgb(100, 143, 209) |
| HSL | hsl(216, 54%, 61%) |
| OKLCH | oklch(64.7% 0.11 258.7) |
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 #648FD1 | 3.28:1 | AA large text | Lc -65.5 | Content text, not long reading |
| Black text on #648FD1 | 6.39:1 | AA | Lc 44.0 | Non-text elements, placeholder text |
| #648FD1 text on white | 3.28:1 | AA large text | Lc 60.1 | Content text, not long reading |
| #648FD1 text on black | 6.39:1 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E4EAF5
oklch(93.6% 0.016 262.8)
-
Step 200
200
#CDDAED
oklch(88.4% 0.03 257.8)
-
Step 300
300
#ACC2E4
oklch(80.9% 0.054 259)
-
Step 400
400
#80A2D7
oklch(70.7% 0.087 259.1)
-
Step 500
500 (this color)
#648FD1
oklch(64.7% 0.11 258.7)
-
Step 600
600
#4673B9
oklch(55.7% 0.12 258.9)
-
Step 700
700
#37609F
oklch(49.1% 0.112 258.7)
-
Step 800
800
#2E4F81
oklch(42.8% 0.092 258.5)
-
Step 900
900
#294267
oklch(37.7% 0.071 258)
-
Step 950
950
#18273D
oklch(27.1% 0.046 257.8)
#648FD1 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) | #7593D4 | 0.024 |
| Deuteranopia (no green cones) | #6889D0 | 0.016 |
| Tritanopia (no blue cones) | #2C9EA7 | 0.098 |
| Achromatopsia (no color) | #8E8E8E | 0.110 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #648FD1
#648FD1
oklch(64.7% 0.11 258.7)
- #B28536
#B28536
oklch(64.6% 0.11 78.5)
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 #648FD1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.033
- Dark Sky Blue #448EE4 ΔE 0.041
- Cornflower Blue #6495ED ΔE 0.042
- Soft Blue #6488EA ΔE 0.046
- Chefchaouen Blue #4895EF ΔE 0.048
- Cool Blue #4984B8 ΔE 0.056
- Dusty Blue #5A86AD ΔE 0.058
- Off Blue #5684AE ΔE 0.060
Use #648FD1 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.