#648CB7
Closest named color: Faded Blue (#658CBB). oklch(62.8% 0.079 250.9), rgb(100, 140, 183).
Aa
Black text reads best on this color (5.97:1).
About this color
#648CB7 is a medium-light, moderately saturated blue. In OKLCH its lightness is 63%, its chroma 0.079 and its hue 251°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.006 away. Black text reads best on it, at 5.97:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.079) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 5.97:1 |
| White text | 3.51:1 |
Values
| HEX | #648CB7 |
| RGB | rgb(100, 140, 183) |
| HSL | hsl(211, 37%, 55%) |
| OKLCH | oklch(62.8% 0.079 250.9) |
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 #648CB7 | 3.51:1 | AA large text | Lc -68.1 | Content text, not long reading |
| Black text on #648CB7 | 5.97:1 | AA | Lc 41.4 | Non-text elements, placeholder text |
| #648CB7 text on white | 3.51:1 | AA large text | Lc 62.6 | Content text, not long reading |
| #648CB7 text on black | 5.97:1 | AA | Lc -39.1 | 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
#CFDAE7
oklch(88.4% 0.022 252.5)
-
Step 300
300
#AFC3D9
oklch(80.9% 0.038 250.8)
-
Step 400
400
#84A4C6
oklch(70.7% 0.061 250.2)
-
Step 500
500 (this color)
#648CB7
oklch(62.8% 0.079 250.9)
-
Step 600
600
#4C77A4
oklch(55.7% 0.085 250.6)
-
Step 700
700
#3C638D
oklch(49% 0.081 251.4)
-
Step 800
800
#325172
oklch(42.6% 0.066 251)
-
Step 900
900
#2C435C
oklch(37.5% 0.052 251.3)
-
Step 950
950
#1A2836
oklch(27.1% 0.032 249.1)
#648CB7 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) | #7B8DB9 | 0.029 |
| Deuteranopia (no green cones) | #7185B6 | 0.023 |
| Tritanopia (no blue cones) | #42969B | 0.068 |
| Achromatopsia (no color) | #898989 | 0.079 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #648CB7
#648CB7
oklch(62.8% 0.079 250.9)
- #A78052
#A78052
oklch(62.7% 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 #648CB7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.006
- Dusty Blue #5A86AD ΔE 0.025
- Off Blue #5684AE ΔE 0.031
- Silver Lake Blue #778DA9 ΔE 0.031
- Blue Grey #758DA3 ΔE 0.037
- Cool Blue #4984B8 ΔE 0.039
- Steel Blue #4682B4 ΔE 0.045
- Light Slate Gray #778899 ΔE 0.047
Use #648CB7 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.