#648DB7
Closest named color: Faded Blue (#658CBB). oklch(63% 0.078 249.7), rgb(100, 141, 183).
Aa
Black text reads best on this color (6.03:1).
About this color
#648DB7 is a medium-light, moderately saturated blue. In OKLCH its lightness is 63%, its chroma 0.078 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.008 away. Black text reads best on it, at 6.03:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.078) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.03:1 |
| White text | 3.47:1 |
Values
| HEX | #648DB7 |
| RGB | rgb(100, 141, 183) |
| HSL | hsl(210, 37%, 55%) |
| OKLCH | oklch(63% 0.078 249.7) |
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 #648DB7 | 3.47:1 | AA large text | Lc -67.7 | Content text, not long reading |
| Black text on #648DB7 | 6.03:1 | AA | Lc 41.8 | Non-text elements, placeholder text |
| #648DB7 text on white | 3.47:1 | AA large text | Lc 62.3 | Content text, not long reading |
| #648DB7 text on black | 6.03:1 | AA | Lc -39.4 | 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
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E4EBF1
oklch(93.6% 0.011 243.7)
-
Step 200
200
#CFDBE7
oklch(88.6% 0.021 248.1)
-
Step 300
300
#AEC3D9
oklch(80.8% 0.039 249.5)
-
Step 400
400
#84A4C6
oklch(70.7% 0.061 250.2)
-
Step 500
500 (this color)
#648DB7
oklch(63% 0.078 249.7)
-
Step 600
600
#4B77A3
oklch(55.6% 0.084 249.6)
-
Step 700
700
#3C648C
oklch(49.2% 0.079 249.7)
-
Step 800
800
#325272
oklch(42.9% 0.066 249.6)
-
Step 900
900
#2C445C
oklch(37.8% 0.051 249.3)
-
Step 950
950
#1A2836
oklch(27.1% 0.032 249.1)
#648DB7 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) | #7C8EB9 | 0.030 |
| Deuteranopia (no green cones) | #7286B6 | 0.024 |
| Tritanopia (no blue cones) | #42979B | 0.068 |
| Achromatopsia (no color) | #898989 | 0.078 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #648DB7
#648DB7
oklch(63% 0.078 249.7)
- #A88153
#A88153
oklch(63% 0.079 70.2)
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 #648DB7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.008
- Dusty Blue #5A86AD ΔE 0.027
- Silver Lake Blue #778DA9 ΔE 0.030
- Off Blue #5684AE ΔE 0.033
- Blue Grey #758DA3 ΔE 0.035
- Cool Blue #4984B8 ΔE 0.041
- Light Slate Gray #778899 ΔE 0.047
- Steel Blue #4682B4 ΔE 0.047
Use #648DB7 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.