#64738B
Closest named color: Battleship Gray (#6C757D). oklch(55.2% 0.042 259.7), rgb(100, 115, 139).
Aa
White text reads best on this color (4.80:1).
About this color
#64738B is a medium-dark, muted blue. In OKLCH its lightness is 55%, its chroma 0.042 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Battleship Gray (#6C757D), ΔE 0.027 away. White text reads best on it, at 4.80:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | muted (0.042) |
| Temperature | cool |
| Nearest name | Battleship Gray (#6C757D) |
| Black text | 4.36:1 |
| White text | 4.80:1 |
Values
| HEX | #64738B |
| RGB | rgb(100, 115, 139) |
| HSL | hsl(217, 16%, 47%) |
| OKLCH | oklch(55.2% 0.042 259.7) |
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 #64738B | 4.80:1 | AA | Lc -78.8 | Fine for body text |
| Black text on #64738B | 4.36:1 | AA large text | Lc 30.7 | Non-text elements, placeholder text |
| #64738B text on white | 4.80:1 | AA | Lc 73.4 | Content text, not long reading |
| #64738B text on black | 4.36:1 | AA large text | Lc -28.3 | 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
#F4F5F7
oklch(97% 0.003 264.5)
-
Step 100
100
#E8EAED
oklch(93.6% 0.005 258.3)
-
Step 200
200
#D5D9E0
oklch(88.4% 0.011 261.8)
-
Step 300
300
#BAC1CD
oklch(80.9% 0.019 261.3)
-
Step 400
400
#96A1B4
oklch(70.6% 0.03 261.4)
-
Step 500
500
#7C8AA1
oklch(63% 0.038 260.3)
-
Step 600
600 (this color)
#64738B
oklch(55.2% 0.042 259.7)
-
Step 700
700
#546177
oklch(49% 0.039 260.9)
-
Step 800
800
#455061
oklch(42.8% 0.032 259)
-
Step 900
900
#3A424F
oklch(37.7% 0.025 260.1)
-
Step 950
950
#22272E
oklch(27.1% 0.015 256.8)
#64738B 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) | #6B748C | 0.011 |
| Deuteranopia (no green cones) | #67708A | 0.009 |
| Tritanopia (no blue cones) | #59787B | 0.037 |
| Achromatopsia (no color) | #727272 | 0.042 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #64738B
#64738B
oklch(55.2% 0.042 259.7)
- #7F7057
#7F7057
oklch(55.2% 0.041 80.3)
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 #64738B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Battleship Gray #6C757D ΔE 0.027
- Metallic Blue #4F738E ΔE 0.027
- Grey Blue #647D8E ΔE 0.029
- Battleship Grey #6B7C85 ΔE 0.033
- Stormy Blue #507B9C ΔE 0.035
- Dull Blue #49759C ΔE 0.039
- Slate Gray #708090 ΔE 0.042
- Cerulean #457B9D ΔE 0.043
Use #64738B 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.