#5B7D8A
Closest named color: Grey Blue (#647D8E). oklch(56.9% 0.043 223.5), rgb(91, 125, 138).
Aa
Black text reads best on this color (4.74:1).
About this color
#5B7D8A is a medium-dark, muted teal or cyan. In OKLCH its lightness is 57%, its chroma 0.043 and its hue 224°. Its hue sits on the cool side of the wheel. The nearest named color is Grey Blue (#647D8E), ΔE 0.014 away. Black text reads best on it, at 4.74:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (57%) |
| Chroma | muted (0.043) |
| Temperature | cool |
| Nearest name | Grey Blue (#647D8E) |
| Black text | 4.74:1 |
| White text | 4.42:1 |
Values
| HEX | #5B7D8A |
| RGB | rgb(91, 125, 138) |
| HSL | hsl(197, 21%, 45%) |
| OKLCH | oklch(56.9% 0.043 223.5) |
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 #5B7D8A | 4.42:1 | AA large text | Lc -76.1 | Fine for body text |
| Black text on #5B7D8A | 4.74:1 | AA | Lc 33.4 | Non-text elements, placeholder text |
| #5B7D8A text on white | 4.42:1 | AA large text | Lc 70.7 | Content text, not long reading |
| #5B7D8A text on black | 4.74:1 | AA | Lc -31.0 | 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
#E6EBED
oklch(93.7% 0.006 223.5)
-
Step 200
200
#D2DBDE
oklch(88.5% 0.011 219.6)
-
Step 300
300
#B4C4CA
oklch(81% 0.019 222.2)
-
Step 400
400
#8CA5AF
oklch(70.6% 0.031 224)
-
Step 500
500
#708F9B
oklch(63.1% 0.039 223.5)
-
Step 600
600 (this color)
#5B7D8A
oklch(56.9% 0.043 223.5)
-
Step 700
700
#476672
oklch(49.1% 0.041 224)
-
Step 800
800
#3B535D
oklch(42.7% 0.034 225.6)
-
Step 900
900
#33454C
oklch(37.8% 0.026 223.7)
-
Step 950
950
#1E282C
oklch(26.9% 0.016 224.2)
#5B7D8A 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) | #767B8B | 0.036 |
| Deuteranopia (no green cones) | #6E758A | 0.032 |
| Tritanopia (no blue cones) | #4B8181 | 0.028 |
| Achromatopsia (no color) | #787878 | 0.044 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B7D8A
#5B7D8A
oklch(56.9% 0.043 223.5)
- #8E6F63
#8E6F63
oklch(56.9% 0.044 42.2)
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 #5B7D8A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grey Blue #647D8E ΔE 0.014
- Battleship Grey #6B7C85 ΔE 0.021
- Battleship Gray #6C757D ΔE 0.031
- Slate Gray #708090 ΔE 0.031
- Steel Grey #6F828A ΔE 0.031
- Stormy Blue #507B9C ΔE 0.032
- Metallic Blue #4F738E ΔE 0.037
- Cerulean #457B9D ΔE 0.039
Use #5B7D8A 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.