#64789D
Closest named color: Stormy Blue (#507B9C). oklch(57.1% 0.062 262.5), rgb(100, 120, 157).
Aa
Black text reads best on this color (4.71:1).
About this color
#64789D is a medium-dark, muted blue. In OKLCH its lightness is 57%, its chroma 0.062 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Stormy Blue (#507B9C), ΔE 0.025 away. Black text reads best on it, at 4.71:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | muted (0.062) |
| Temperature | cool |
| Nearest name | Stormy Blue (#507B9C) |
| Black text | 4.71:1 |
| White text | 4.45:1 |
Values
| HEX | #64789D |
| RGB | rgb(100, 120, 157) |
| HSL | hsl(219, 23%, 50%) |
| OKLCH | oklch(57.1% 0.062 262.5) |
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 #64789D | 4.45:1 | AA large text | Lc -76.4 | Fine for body text |
| Black text on #64789D | 4.71:1 | AA | Lc 33.2 | Non-text elements, placeholder text |
| #64789D text on white | 4.45:1 | AA large text | Lc 70.9 | Content text, not long reading |
| #64789D text on black | 4.71:1 | AA | Lc -30.8 | 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
#F4F5F8
oklch(97% 0.004 271.4)
-
Step 100
100
#E7EAEF
oklch(93.6% 0.007 260.7)
-
Step 200
200
#D4D9E4
oklch(88.5% 0.016 266.3)
-
Step 300
300
#B7C1D3
oklch(80.9% 0.028 262.3)
-
Step 400
400
#92A1BD
oklch(70.7% 0.044 262.9)
-
Step 500
500
#778AAD
oklch(63.1% 0.057 262.5)
-
Step 600
600 (this color)
#64789D
oklch(57.1% 0.062 262.5)
-
Step 700
700
#4F6182
oklch(49.1% 0.058 262.3)
-
Step 800
800
#414F6A
oklch(42.7% 0.049 263.2)
-
Step 900
900
#374256
oklch(37.8% 0.037 262.2)
-
Step 950
950
#202732
oklch(27.1% 0.023 259.3)
#64789D 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) | #6B7A9F | 0.012 |
| Deuteranopia (no green cones) | #66759C | 0.008 |
| Tritanopia (no blue cones) | #528085 | 0.056 |
| Achromatopsia (no color) | #777777 | 0.062 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #64789D
#64789D
oklch(57.1% 0.062 262.5)
- #8A754C
#8A754C
oklch(57.2% 0.063 83.5)
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 #64789D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Stormy Blue #507B9C ΔE 0.025
- Grey Blue #647D8E ΔE 0.032
- Dull Blue #49759C ΔE 0.035
- Cerulean #457B9D ΔE 0.035
- Off Blue #5684AE ΔE 0.038
- Metallic Blue #4F738E ΔE 0.039
- Slate Gray #708090 ΔE 0.039
- Dusty Blue #5A86AD ΔE 0.041
Use #64789D 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.