#648BB2
Closest named color: Faded Blue (#658CBB). oklch(62.3% 0.074 249.1), rgb(100, 139, 178).
Aa
Black text reads best on this color (5.87:1).
About this color
#648BB2 is a medium-light, moderately saturated blue. In OKLCH its lightness is 62%, its chroma 0.074 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.014 away. Black text reads best on it, at 5.87:1.
| Hue family | Blues |
| Lightness | medium-light (62%) |
| Chroma | moderately saturated (0.074) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 5.87:1 |
| White text | 3.57:1 |
Values
| HEX | #648BB2 |
| RGB | rgb(100, 139, 178) |
| HSL | hsl(210, 34%, 55%) |
| OKLCH | oklch(62.3% 0.074 249.1) |
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 #648BB2 | 3.57:1 | AA large text | Lc -68.7 | Content text, not long reading |
| Black text on #648BB2 | 5.87:1 | AA | Lc 40.8 | Non-text elements, placeholder text |
| #648BB2 text on white | 3.57:1 | AA large text | Lc 63.3 | Content text, not long reading |
| #648BB2 text on black | 5.87:1 | AA | Lc -38.4 | 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
#E5EBF1
oklch(93.7% 0.01 247.9)
-
Step 200
200
#CFDBE6
oklch(88.6% 0.02 245.7)
-
Step 300
300
#AFC3D7
oklch(80.8% 0.036 248.3)
-
Step 400
400
#85A4C4
oklch(70.7% 0.058 249.5)
-
Step 500
500 (this color)
#648BB2
oklch(62.3% 0.074 249.1)
-
Step 600
600
#4D77A0
oklch(55.6% 0.08 248.9)
-
Step 700
700
#3E6489
oklch(49.1% 0.074 248.9)
-
Step 800
800
#33526F
oklch(42.8% 0.061 247.8)
-
Step 900
900
#2D445A
oklch(37.8% 0.048 248.1)
-
Step 950
950
#1B2835
oklch(27.1% 0.03 249)
#648BB2 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) | #7C8CB4 | 0.031 |
| Deuteranopia (no green cones) | #7284B1 | 0.024 |
| Tritanopia (no blue cones) | #469498 | 0.063 |
| Achromatopsia (no color) | #878787 | 0.074 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #648BB2
#648BB2
oklch(62.3% 0.074 249.1)
- #A47F55
#A47F55
oklch(62.2% 0.074 69.3)
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 #648BB2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.014
- Dusty Blue #5A86AD ΔE 0.020
- Off Blue #5684AE ΔE 0.027
- Silver Lake Blue #778DA9 ΔE 0.028
- Blue Grey #758DA3 ΔE 0.032
- Cool Blue #4984B8 ΔE 0.039
- Light Slate Gray #778899 ΔE 0.041
- Steel Blue #4682B4 ΔE 0.044
Use #648BB2 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.