#648CB8
Closest named color: Faded Blue (#658CBB). oklch(62.8% 0.08 251.5), rgb(100, 140, 184).
Aa
Black text reads best on this color (5.98:1).
About this color
#648CB8 is a medium-light, moderately saturated blue. In OKLCH its lightness is 63%, its chroma 0.080 and its hue 251°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.005 away. Black text reads best on it, at 5.98:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.080) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 5.98:1 |
| White text | 3.50:1 |
Values
| HEX | #648CB8 |
| RGB | rgb(100, 140, 184) |
| HSL | hsl(211, 37%, 56%) |
| OKLCH | oklch(62.8% 0.08 251.5) |
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 #648CB8 | 3.50:1 | AA large text | Lc -68.1 | Content text, not long reading |
| Black text on #648CB8 | 5.98:1 | AA | Lc 41.5 | Non-text elements, placeholder text |
| #648CB8 text on white | 3.50:1 | AA large text | Lc 62.6 | Content text, not long reading |
| #648CB8 text on black | 5.98:1 | 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
#AFC3DA
oklch(80.9% 0.039 252)
-
Step 400
400
#84A4C7
oklch(70.7% 0.063 251)
-
Step 500
500 (this color)
#648CB8
oklch(62.8% 0.08 251.5)
-
Step 600
600
#4B76A5
oklch(55.5% 0.088 251.7)
-
Step 700
700
#3C638D
oklch(49% 0.081 251.4)
-
Step 800
800
#325173
oklch(42.7% 0.068 251.8)
-
Step 900
900
#2C435D
oklch(37.6% 0.053 252.2)
-
Step 950
950
#1A2836
oklch(27.1% 0.032 249.1)
#648CB8 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) | #7B8DBA | 0.029 |
| Deuteranopia (no green cones) | #7085B7 | 0.023 |
| Tritanopia (no blue cones) | #42969B | 0.069 |
| Achromatopsia (no color) | #898989 | 0.080 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #648CB8
#648CB8
oklch(62.8% 0.08 251.5)
- #A78151
#A78151
oklch(62.9% 0.08 72)
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 #648CB8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.005
- Dusty Blue #5A86AD ΔE 0.026
- Off Blue #5684AE ΔE 0.031
- Silver Lake Blue #778DA9 ΔE 0.032
- Blue Grey #758DA3 ΔE 0.038
- Cool Blue #4984B8 ΔE 0.039
- Steel Blue #4682B4 ΔE 0.045
- Light Slate Gray #778899 ΔE 0.049
Use #648CB8 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.