#64739F
Closest named color: Stormy Blue (#507B9C). oklch(56.1% 0.071 269.5), rgb(100, 115, 159).
Aa
White text reads best on this color (4.67:1).
About this color
#64739F is a medium-dark, moderately saturated blue. In OKLCH its lightness is 56%, its chroma 0.071 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Stormy Blue (#507B9C), ΔE 0.033 away. White text reads best on it, at 4.67:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.071) |
| Temperature | cool |
| Nearest name | Stormy Blue (#507B9C) |
| Black text | 4.49:1 |
| White text | 4.67:1 |
Values
| HEX | #64739F |
| RGB | rgb(100, 115, 159) |
| HSL | hsl(225, 24%, 51%) |
| OKLCH | oklch(56.1% 0.071 269.5) |
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 #64739F | 4.67:1 | AA | Lc -77.9 | Fine for body text |
| Black text on #64739F | 4.49:1 | AA large text | Lc 31.7 | Non-text elements, placeholder text |
| #64739F text on white | 4.67:1 | AA | Lc 72.4 | Content text, not long reading |
| #64739F text on black | 4.49:1 | AA large text | Lc -29.3 | 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
#F4F5F8
oklch(97% 0.004 271.4)
-
Step 100
100
#E7EAF0
oklch(93.6% 0.009 264.5)
-
Step 200
200
#D4D9E5
oklch(88.5% 0.017 267.8)
-
Step 300
300
#B8C0D6
oklch(80.9% 0.032 269.8)
-
Step 400
400
#94A0C1
oklch(70.8% 0.05 269.4)
-
Step 500
500
#7A88B2
oklch(63.1% 0.066 270.2)
-
Step 600
600 (this color)
#64739F
oklch(56.1% 0.071 269.5)
-
Step 700
700
#525F87
oklch(49.1% 0.066 270)
-
Step 800
800
#434E6D
oklch(42.8% 0.054 269)
-
Step 900
900
#384159
oklch(37.8% 0.043 268.4)
-
Step 950
950
#212634
oklch(27% 0.027 269.3)
#64739F 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) | #6577A1 | 0.011 |
| Deuteranopia (no green cones) | #5F729E | 0.008 |
| Tritanopia (no blue cones) | #527C82 | 0.065 |
| Achromatopsia (no color) | #747474 | 0.071 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #64739F
#64739F
oklch(56.1% 0.071 269.5)
- #857342
#857342
oklch(56.1% 0.071 89.9)
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 #64739F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Stormy Blue #507B9C ΔE 0.033
- Dull Blue #49759C ΔE 0.034
- Metallic Blue #4F738E ΔE 0.040
- Cerulean #457B9D ΔE 0.041
- Grey Blue #647D8E ΔE 0.045
- Flat Blue #3C73A8 ΔE 0.047
- Off Blue #5684AE ΔE 0.048
- Muted Blue #3B719F ΔE 0.049
Use #64739F 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.