#5B8499
Closest named color: Grey Blue (#647D8E). oklch(59.1% 0.056 231.2), rgb(91, 132, 153).
Aa
Black text reads best on this color (5.20:1).
About this color
#5B8499 is a medium-dark, muted blue. In OKLCH its lightness is 59%, its chroma 0.056 and its hue 231°. Its hue sits on the cool side of the wheel. The nearest named color is Grey Blue (#647D8E), ΔE 0.023 away. Black text reads best on it, at 5.20:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | muted (0.056) |
| Temperature | cool |
| Nearest name | Grey Blue (#647D8E) |
| Black text | 5.20:1 |
| White text | 4.03:1 |
Values
| HEX | #5B8499 |
| RGB | rgb(91, 132, 153) |
| HSL | hsl(200, 25%, 48%) |
| OKLCH | oklch(59.1% 0.056 231.2) |
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 #5B8499 | 4.03:1 | AA large text | Lc -73.0 | Content text, not long reading |
| Black text on #5B8499 | 5.20:1 | AA | Lc 36.5 | Non-text elements, placeholder text |
| #5B8499 text on white | 4.03:1 | AA large text | Lc 67.5 | Content text, not long reading |
| #5B8499 text on black | 5.20:1 | AA | Lc -34.1 | 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
#F3F6F7
oklch(97.1% 0.003 219.5)
-
Step 100
100
#E5EBEE
oklch(93.6% 0.008 228.9)
-
Step 200
200
#D0DBE1
oklch(88.5% 0.015 231.2)
-
Step 300
300
#B1C4CE
oklch(80.9% 0.025 230.5)
-
Step 400
400
#88A6B5
oklch(70.8% 0.04 229.6)
-
Step 500
500
#6A90A3
oklch(63.2% 0.051 230.2)
-
Step 600
600 (this color)
#5B8499
oklch(59.1% 0.056 231.2)
-
Step 700
700
#416679
oklch(49% 0.052 231.6)
-
Step 800
800
#365362
oklch(42.6% 0.043 231.6)
-
Step 900
900
#2F4550
oklch(37.7% 0.033 230.4)
-
Step 950
950
#1C282F
oklch(26.9% 0.021 234.2)
#5B8499 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) | #7A829A | 0.040 |
| Deuteranopia (no green cones) | #717B99 | 0.036 |
| Tritanopia (no blue cones) | #438A8B | 0.041 |
| Achromatopsia (no color) | #7E7E7E | 0.056 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B8499
#5B8499
oklch(59.1% 0.056 231.2)
- #99745F
#99745F
oklch(59% 0.056 50.9)
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 #5B8499, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grey Blue #647D8E ΔE 0.023
- Slate Gray #708090 ΔE 0.028
- Dusty Blue #5A86AD ΔE 0.030
- Steel #738595 ΔE 0.031
- Steel Grey #6F828A ΔE 0.031
- Stormy Blue #507B9C ΔE 0.032
- Off Blue #5684AE ΔE 0.033
- Battleship Grey #6B7C85 ΔE 0.035
Use #5B8499 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.