#6C8199
Closest named color: Slate Gray (#708090). oklch(59.5% 0.044 252), rgb(108, 129, 153).
Aa
Black text reads best on this color (5.23:1).
About this color
#6C8199 is a medium-dark, muted blue. In OKLCH its lightness is 60%, its chroma 0.044 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Slate Gray (#708090), ΔE 0.014 away. Black text reads best on it, at 5.23:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | muted (0.044) |
| Temperature | cool |
| Nearest name | Slate Gray (#708090) |
| Black text | 5.23:1 |
| White text | 4.00:1 |
Values
| HEX | #6C8199 |
| RGB | rgb(108, 129, 153) |
| HSL | hsl(212, 18%, 51%) |
| OKLCH | oklch(59.5% 0.044 252) |
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 #6C8199 | 4.00:1 | AA large text | Lc -72.9 | Content text, not long reading |
| Black text on #6C8199 | 5.23:1 | AA | Lc 36.7 | Non-text elements, placeholder text |
| #6C8199 text on white | 4.00:1 | AA large text | Lc 67.4 | Content text, not long reading |
| #6C8199 text on black | 5.23:1 | AA | Lc -34.3 | 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 500.
-
Step 50
50
#F4F6F7
oklch(97.2% 0.003 228.8)
-
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
#B7C2CF
oklch(81% 0.022 252.5)
-
Step 400
400
#91A2B6
oklch(70.6% 0.035 252.6)
-
Step 500
500 (this color)
#6C8199
oklch(59.5% 0.044 252)
-
Step 600
600
#5F768F
oklch(55.7% 0.048 250.8)
-
Step 700
700
#4E637A
oklch(49.2% 0.045 251)
-
Step 800
800
#405163
oklch(42.8% 0.037 250.2)
-
Step 900
900
#374351
oklch(37.8% 0.029 252.5)
-
Step 950
950
#20272F
oklch(26.9% 0.018 251.9)
#6C8199 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) | #78829A | 0.017 |
| Deuteranopia (no green cones) | #737D99 | 0.014 |
| Tritanopia (no blue cones) | #5F8689 | 0.037 |
| Achromatopsia (no color) | #7F7F7F | 0.044 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6C8199
#6C8199
oklch(59.5% 0.044 252)
- #907B62
#907B62
oklch(59.6% 0.045 71.7)
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 #6C8199, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate Gray #708090 ΔE 0.014
- Steel #738595 ΔE 0.018
- Grey Blue #647D8E ΔE 0.022
- Steel Grey #6F828A ΔE 0.025
- Lavender Gray #7E7F9A ΔE 0.025
- Light Slate Gray #778899 ΔE 0.027
- Battleship Grey #6B7C85 ΔE 0.030
- Dusty Blue #5A86AD ΔE 0.034
Use #6C8199 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.