#64688B
Closest named color: Metallic Blue (#4F738E). oklch(52.8% 0.055 279.3), rgb(100, 104, 139).
Aa
White text reads best on this color (5.39:1).
About this color
#64688B is a medium-dark, muted blue. In OKLCH its lightness is 53%, its chroma 0.055 and its hue 279°. Its hue sits on the cool side of the wheel. The nearest named color is Metallic Blue (#4F738E), ΔE 0.039 away. White text reads best on it, at 5.39:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | muted (0.055) |
| Temperature | cool |
| Nearest name | Metallic Blue (#4F738E) |
| Black text | 3.89:1 |
| White text | 5.39:1 |
Values
| HEX | #64688B |
| RGB | rgb(100, 104, 139) |
| HSL | hsl(234, 16%, 47%) |
| OKLCH | oklch(52.8% 0.055 279.3) |
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 #64688B | 5.39:1 | AA | Lc -82.2 | Fine for body text |
| Black text on #64688B | 3.89:1 | AA large text | Lc 27.2 | Dividers and decoration only |
| #64688B text on white | 5.39:1 | AA | Lc 76.9 | Fine for body text |
| #64688B text on black | 3.89:1 | AA large text | Lc -24.9 | Dividers and decoration only |
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
#F5F5F8
oklch(97.1% 0.004 286.3)
-
Step 100
100
#E9E9EF
oklch(93.6% 0.008 286.2)
-
Step 200
200
#D7D8E2
oklch(88.4% 0.014 281.5)
-
Step 300
300
#BDBFD1
oklch(80.9% 0.025 280.8)
-
Step 400
400
#9B9EBA
oklch(70.6% 0.041 280.5)
-
Step 500
500
#8287A8
oklch(63.1% 0.05 278.1)
-
Step 600
600 (this color)
#64688B
oklch(52.8% 0.055 279.3)
-
Step 700
700
#5A5E7E
oklch(49.1% 0.051 278.8)
-
Step 800
800
#4A4D66
oklch(42.8% 0.042 279.2)
-
Step 900
900
#3E4053
oklch(37.7% 0.033 280)
-
Step 950
950
#242531
oklch(26.9% 0.022 281.1)
#64688B 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) | #5E6C8D | 0.013 |
| Deuteranopia (no green cones) | #5C698A | 0.012 |
| Tritanopia (no blue cones) | #5A6E74 | 0.049 |
| Achromatopsia (no color) | #6A6A6A | 0.055 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #64688B
#64688B
oklch(52.8% 0.055 279.3)
- #736C46
#736C46
oklch(52.8% 0.056 99)
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 #64688B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Metallic Blue #4F738E ΔE 0.039
- Dull Blue #49759C ΔE 0.048
- Slate #516572 ΔE 0.050
- Grey Purple #826D8C ΔE 0.050
- Dusty Purple #825F87 ΔE 0.051
- Battleship Gray #6C757D ΔE 0.052
- Muted Purple #805B87 ΔE 0.054
- Dusky Blue #475F94 ΔE 0.054
Use #64688B 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.