#648FDF
Closest named color: Cornflower Blue (#6495ED). oklch(65.4% 0.129 262), rgb(100, 143, 223).
Aa
Black text reads best on this color (6.53:1).
About this color
#648FDF is a medium-light, moderately saturated blue. In OKLCH its lightness is 65%, its chroma 0.129 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.024 away. Black text reads best on it, at 6.53:1.
| Hue family | Blues |
| Lightness | medium-light (65%) |
| Chroma | moderately saturated (0.129) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 6.53:1 |
| White text | 3.21:1 |
Values
| HEX | #648FDF |
| RGB | rgb(100, 143, 223) |
| HSL | hsl(219, 66%, 63%) |
| OKLCH | oklch(65.4% 0.129 262) |
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 #648FDF | 3.21:1 | AA large text | Lc -64.6 | Content text, not long reading |
| Black text on #648FDF | 6.53:1 | AA | Lc 44.9 | Non-text elements, placeholder text |
| #648FDF text on white | 3.21:1 | AA large text | Lc 59.2 | Large or bold text, headings |
| #648FDF text on black | 6.53:1 | AA | Lc -42.5 | 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
#E3EAF7
oklch(93.6% 0.019 263)
-
Step 200
200
#CDDAF1
oklch(88.6% 0.035 262)
-
Step 300
300
#ABC1EA
oklch(80.8% 0.063 262.8)
-
Step 400
400
#7EA1E0
oklch(70.8% 0.101 261.8)
-
Step 500
500 (this color)
#648FDF
oklch(65.4% 0.129 262)
-
Step 600
600
#4470C5
oklch(55.6% 0.141 262.2)
-
Step 700
700
#355DAA
oklch(49% 0.131 262.1)
-
Step 800
800
#2D4D8A
oklch(42.8% 0.108 262)
-
Step 900
900
#28406E
oklch(37.6% 0.085 262.3)
-
Step 950
950
#182640
oklch(27% 0.052 262)
#648FDF 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) | #6E96E2 | 0.023 |
| Deuteranopia (no green cones) | #5F8ADD | 0.015 |
| Tritanopia (no blue cones) | #14A1AC | 0.117 |
| Achromatopsia (no color) | #909090 | 0.129 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #648FDF
#648FDF
oklch(65.4% 0.129 262)
- #B78717
#B78717
oklch(65.3% 0.129 82)
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 #648FDF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.024
- Soft Blue #6488EA ΔE 0.027
- Dark Sky Blue #448EE4 ΔE 0.031
- Chefchaouen Blue #4895EF ΔE 0.033
- Faded Blue #658CBB ΔE 0.054
- Perrywinkle #8F8CE7 ΔE 0.056
- Dodger Blue #1E90FF ΔE 0.066
- Lavender Blue #8B88F8 ΔE 0.066
Use #648FDF 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.