#64819B
Closest named color: Grey Blue (#647D8E). oklch(59.1% 0.052 245.9), rgb(100, 129, 155).
Aa
Black text reads best on this color (5.15:1).
About this color
#64819B is a medium-dark, muted blue. In OKLCH its lightness is 59%, its chroma 0.052 and its hue 246°. Its hue sits on the cool side of the wheel. The nearest named color is Grey Blue (#647D8E), ΔE 0.020 away. Black text reads best on it, at 5.15:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | muted (0.052) |
| Temperature | cool |
| Nearest name | Grey Blue (#647D8E) |
| Black text | 5.15:1 |
| White text | 4.07:1 |
Values
| HEX | #64819B |
| RGB | rgb(100, 129, 155) |
| HSL | hsl(208, 22%, 50%) |
| OKLCH | oklch(59.1% 0.052 245.9) |
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 #64819B | 4.07:1 | AA large text | Lc -73.4 | Content text, not long reading |
| Black text on #64819B | 5.15:1 | AA | Lc 36.2 | Non-text elements, placeholder text |
| #64819B text on white | 4.07:1 | AA large text | Lc 67.9 | Content text, not long reading |
| #64819B text on black | 5.15:1 | AA | Lc -33.8 | 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 600.
-
Step 50
50
#F4F6F7
oklch(97.2% 0.003 228.8)
-
Step 100
100
#E6EAEE
oklch(93.5% 0.007 247.9)
-
Step 200
200
#D2DAE1
oklch(88.4% 0.013 244.3)
-
Step 300
300
#B5C3CF
oklch(81% 0.023 243.9)
-
Step 400
400
#8EA3B7
oklch(70.6% 0.038 247.1)
-
Step 500
500
#728DA5
oklch(63.1% 0.048 245.5)
-
Step 600
600 (this color)
#64819B
oklch(59.1% 0.052 245.9)
-
Step 700
700
#4A647B
oklch(49.2% 0.048 245.7)
-
Step 800
800
#3D5164
oklch(42.6% 0.04 247.5)
-
Step 900
900
#344351
oklch(37.6% 0.031 246.9)
-
Step 950
950
#1F2830
oklch(27.2% 0.02 245.4)
#64819B 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) | #77819C | 0.025 |
| Deuteranopia (no green cones) | #707B9B | 0.022 |
| Tritanopia (no blue cones) | #528789 | 0.044 |
| Achromatopsia (no color) | #7E7E7E | 0.052 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #64819B
#64819B
oklch(59.1% 0.052 245.9)
- #93785D
#93785D
oklch(59.1% 0.052 66.6)
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 #64819B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grey Blue #647D8E ΔE 0.020
- Slate Gray #708090 ΔE 0.021
- Steel #738595 ΔE 0.026
- Dusty Blue #5A86AD ΔE 0.028
- Steel Grey #6F828A ΔE 0.030
- Off Blue #5684AE ΔE 0.031
- Stormy Blue #507B9C ΔE 0.032
- Battleship Grey #6B7C85 ΔE 0.033
Use #64819B 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.