#648AA9
Closest named color: Dusty Blue (#5A86AD). oklch(61.7% 0.063 243.7), rgb(100, 138, 169).
Aa
Black text reads best on this color (5.75:1).
About this color
#648AA9 is a medium-dark, muted blue. In OKLCH its lightness is 62%, its chroma 0.063 and its hue 244°. Its hue sits on the cool side of the wheel. The nearest named color is Dusty Blue (#5A86AD), ΔE 0.019 away. Black text reads best on it, at 5.75:1.
| Hue family | Blues |
| Lightness | medium-dark (62%) |
| Chroma | muted (0.063) |
| Temperature | cool |
| Nearest name | Dusty Blue (#5A86AD) |
| Black text | 5.75:1 |
| White text | 3.65:1 |
Values
| HEX | #648AA9 |
| RGB | rgb(100, 138, 169) |
| HSL | hsl(207, 29%, 53%) |
| OKLCH | oklch(61.7% 0.063 243.7) |
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 #648AA9 | 3.65:1 | AA large text | Lc -69.6 | Content text, not long reading |
| Black text on #648AA9 | 5.75:1 | AA | Lc 40.0 | Non-text elements, placeholder text |
| #648AA9 text on white | 3.65:1 | AA large text | Lc 64.1 | Content text, not long reading |
| #648AA9 text on black | 5.75:1 | AA | Lc -37.6 | 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E5EBEF
oklch(93.7% 0.008 236.6)
-
Step 200
200
#D0DBE4
oklch(88.6% 0.017 242.5)
-
Step 300
300
#B0C3D4
oklch(80.8% 0.032 245.2)
-
Step 400
400
#87A5BE
oklch(70.8% 0.05 243.7)
-
Step 500
500 (this color)
#648AA9
oklch(61.7% 0.063 243.7)
-
Step 600
600
#4F7899
oklch(55.6% 0.069 243.7)
-
Step 700
700
#406583
oklch(49.2% 0.064 244.1)
-
Step 800
800
#35526A
oklch(42.6% 0.053 244.5)
-
Step 900
900
#2E4456
oklch(37.6% 0.041 243.9)
-
Step 950
950
#1B2832
oklch(27% 0.026 242)
#648AA9 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) | #7D8AAB | 0.032 |
| Deuteranopia (no green cones) | #7483A8 | 0.026 |
| Tritanopia (no blue cones) | #4B9194 | 0.051 |
| Achromatopsia (no color) | #868686 | 0.063 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #648AA9
#648AA9
oklch(61.7% 0.063 243.7)
- #A17D5D
#A17D5D
oklch(61.7% 0.064 62.9)
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 #648AA9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusty Blue #5A86AD ΔE 0.019
- Blue Grey #758DA3 ΔE 0.026
- Silver Lake Blue #778DA9 ΔE 0.026
- Faded Blue #658CBB ΔE 0.027
- Off Blue #5684AE ΔE 0.027
- Light Slate Gray #778899 ΔE 0.031
- Steel #738595 ΔE 0.033
- Slate Gray #708090 ΔE 0.041
Use #648AA9 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.