#658091
Closest named color: Grey Blue (#647D8E). oklch(58.5% 0.041 236), rgb(101, 128, 145).
Aa
Black text reads best on this color (5.04:1).
About this color
#658091 is a medium-dark, muted blue. In OKLCH its lightness is 59%, its chroma 0.041 and its hue 236°. Its hue sits on the cool side of the wheel. The nearest named color is Grey Blue (#647D8E), ΔE 0.009 away. Black text reads best on it, at 5.04:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | muted (0.041) |
| Temperature | cool |
| Nearest name | Grey Blue (#647D8E) |
| Black text | 5.04:1 |
| White text | 4.15:1 |
Values
| HEX | #658091 |
| RGB | rgb(101, 128, 145) |
| HSL | hsl(203, 18%, 48%) |
| OKLCH | oklch(58.5% 0.041 236) |
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 #658091 | 4.15:1 | AA large text | Lc -74.1 | Content text, not long reading |
| Black text on #658091 | 5.04:1 | AA | Lc 35.5 | Non-text elements, placeholder text |
| #658091 text on white | 4.15:1 | AA large text | Lc 68.6 | Content text, not long reading |
| #658091 text on black | 5.04:1 | AA | Lc -33.0 | 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
#F4F6F7
oklch(97.2% 0.003 228.8)
-
Step 100
100
#E7EAED
oklch(93.6% 0.005 247.9)
-
Step 200
200
#D3DADF
oklch(88.4% 0.01 238.5)
-
Step 300
300
#B6C3CB
oklch(81% 0.018 234.6)
-
Step 400
400
#90A4B1
oklch(70.7% 0.029 236.4)
-
Step 500
500
#748D9D
oklch(63% 0.037 236.3)
-
Step 600
600 (this color)
#658091
oklch(58.5% 0.041 236)
-
Step 700
700
#4C6474
oklch(49% 0.039 237.8)
-
Step 800
800
#3F525E
oklch(42.7% 0.031 236.2)
-
Step 900
900
#35444D
oklch(37.7% 0.025 234.6)
-
Step 950
950
#1F282D
oklch(27% 0.016 232.4)
#658091 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) | #787F92 | 0.026 |
| Deuteranopia (no green cones) | #727A91 | 0.023 |
| Tritanopia (no blue cones) | #578485 | 0.031 |
| Achromatopsia (no color) | #7C7C7C | 0.041 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #658091
#658091
oklch(58.5% 0.041 236)
- #8F7665
#8F7665
oklch(58.5% 0.04 56)
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 #658091, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grey Blue #647D8E ΔE 0.009
- Slate Gray #708090 ΔE 0.014
- Steel Grey #6F828A ΔE 0.019
- Battleship Grey #6B7C85 ΔE 0.019
- Steel #738595 ΔE 0.025
- Light Slate Gray #778899 ΔE 0.036
- Stormy Blue #507B9C ΔE 0.036
- Battleship Gray #6C757D ΔE 0.037
Use #658091 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.