#647790
Closest named color: Grey Blue (#647D8E). oklch(56.3% 0.045 255.4), rgb(100, 119, 144).
Aa
Black text reads best on this color (4.58:1).
About this color
#647790 is a medium-dark, muted blue. In OKLCH its lightness is 56%, its chroma 0.045 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Grey Blue (#647D8E), ΔE 0.019 away. Black text reads best on it, at 4.58:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | muted (0.045) |
| Temperature | cool |
| Nearest name | Grey Blue (#647D8E) |
| Black text | 4.58:1 |
| White text | 4.58:1 |
Values
| HEX | #647790 |
| RGB | rgb(100, 119, 144) |
| HSL | hsl(214, 18%, 48%) |
| OKLCH | oklch(56.3% 0.045 255.4) |
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 #647790 | 4.58:1 | AA | Lc -77.3 | Fine for body text |
| Black text on #647790 | 4.58:1 | AA | Lc 32.3 | Non-text elements, placeholder text |
| #647790 text on white | 4.58:1 | AA | Lc 71.8 | Content text, not long reading |
| #647790 text on black | 4.58:1 | AA | Lc -29.9 | 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
#F4F5F7
oklch(97% 0.003 264.5)
-
Step 100
100
#E7EAEE
oklch(93.6% 0.006 255.5)
-
Step 200
200
#D4DAE1
oklch(88.6% 0.012 252.1)
-
Step 300
300
#B8C1CE
oklch(80.8% 0.021 257.5)
-
Step 400
400
#94A2B5
oklch(70.7% 0.032 256)
-
Step 500
500
#798BA3
oklch(63.1% 0.042 255.7)
-
Step 600
600 (this color)
#647790
oklch(56.3% 0.045 255.4)
-
Step 700
700
#516279
oklch(49.1% 0.043 256.1)
-
Step 800
800
#425062
oklch(42.6% 0.035 254.9)
-
Step 900
900
#384250
oklch(37.6% 0.027 256.8)
-
Step 950
950
#21272F
oklch(27% 0.017 255.7)
#647790 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) | #6E7891 | 0.015 |
| Deuteranopia (no green cones) | #69738F | 0.012 |
| Tritanopia (no blue cones) | #577C7F | 0.039 |
| Achromatopsia (no color) | #757575 | 0.045 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #647790
#647790
oklch(56.3% 0.045 255.4)
- #857258
#857258
oklch(56.3% 0.045 75.3)
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 #647790, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grey Blue #647D8E ΔE 0.019
- Battleship Grey #6B7C85 ΔE 0.028
- Stormy Blue #507B9C ΔE 0.028
- Battleship Gray #6C757D ΔE 0.029
- Metallic Blue #4F738E ΔE 0.030
- Slate Gray #708090 ΔE 0.033
- Cerulean #457B9D ΔE 0.038
- Dull Blue #49759C ΔE 0.038
Use #647790 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.