#648BD4
Closest named color: Dark Sky Blue (#448EE4). oklch(64% 0.119 262.2), rgb(100, 139, 212).
Aa
Black text reads best on this color (6.18:1).
About this color
#648BD4 is a medium-light, moderately saturated blue. In OKLCH its lightness is 64%, its chroma 0.119 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.036 away. Black text reads best on it, at 6.18:1.
| Hue family | Blues |
| Lightness | medium-light (64%) |
| Chroma | moderately saturated (0.119) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 6.18:1 |
| White text | 3.39:1 |
Values
| HEX | #648BD4 |
| RGB | rgb(100, 139, 212) |
| HSL | hsl(219, 57%, 61%) |
| OKLCH | oklch(64% 0.119 262.2) |
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 #648BD4 | 3.39:1 | AA large text | Lc -66.8 | Content text, not long reading |
| Black text on #648BD4 | 6.18:1 | AA | Lc 42.8 | Non-text elements, placeholder text |
| #648BD4 text on white | 3.39:1 | AA large text | Lc 61.3 | Content text, not long reading |
| #648BD4 text on black | 6.18:1 | AA | Lc -40.4 | 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
#F3F6FB
oklch(97.2% 0.007 260.7)
-
Step 100
100
#E4EAF5
oklch(93.6% 0.016 262.8)
-
Step 200
200
#CEDAEF
oklch(88.6% 0.032 261.7)
-
Step 300
300
#ADC1E7
oklch(80.9% 0.058 263.2)
-
Step 400
400
#81A1DB
oklch(70.8% 0.093 262)
-
Step 500
500 (this color)
#648BD4
oklch(64% 0.119 262.2)
-
Step 600
600
#4871BE
oklch(55.6% 0.129 261.9)
-
Step 700
700
#3A5EA4
oklch(49.1% 0.12 262.3)
-
Step 800
800
#304D85
oklch(42.7% 0.1 262.3)
-
Step 900
900
#2A416A
oklch(37.7% 0.076 261.3)
-
Step 950
950
#19263E
oklch(27% 0.049 262)
#648BD4 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) | #6E91D7 | 0.021 |
| Deuteranopia (no green cones) | #6187D2 | 0.012 |
| Tritanopia (no blue cones) | #299BA6 | 0.106 |
| Achromatopsia (no color) | #8B8B8B | 0.119 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #648BD4
#648BD4
oklch(64% 0.119 262.2)
- #B08426
#B08426
oklch(64% 0.119 81.9)
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 #648BD4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.036
- Soft Blue #6488EA ΔE 0.036
- Faded Blue #658CBB ΔE 0.039
- Cornflower Blue #6495ED ΔE 0.042
- Chefchaouen Blue #4895EF ΔE 0.047
- Cool Blue #4984B8 ΔE 0.055
- Dusty Blue #5A86AD ΔE 0.061
- Off Blue #5684AE ΔE 0.062
Use #648BD4 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.