#818F9D
Closest named color: Blue Grey (#758DA3). oklch(64.3% 0.027 248.2), rgb(129, 143, 157).
Aa
Black text reads best on this color (6.34:1).
About this color
#818F9D is a medium-light close to neutral grey. In OKLCH its lightness is 64%, its chroma 0.027. It has too little chroma to lean warm or cool. The nearest named color is Blue Grey (#758DA3), ΔE 0.020 away. Black text reads best on it, at 6.34:1.
| Hue family | Neutrals |
| Lightness | medium-light (64%) |
| Chroma | close to neutral grey (0.027) |
| Temperature | neutral |
| Nearest name | Blue Grey (#758DA3) |
| Black text | 6.34:1 |
| White text | 3.30:1 |
Values
| HEX | #818F9D |
| RGB | rgb(129, 143, 157) |
| HSL | hsl(210, 13%, 56%) |
| OKLCH | oklch(64.3% 0.027 248.2) |
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 #818F9D | 3.30:1 | AA large text | Lc -65.9 | Content text, not long reading |
| Black text on #818F9D | 6.34:1 | AA | Lc 43.6 | Non-text elements, placeholder text |
| #818F9D text on white | 3.30:1 | AA large text | Lc 60.5 | Content text, not long reading |
| #818F9D text on black | 6.34:1 | AA | Lc -41.2 | 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
#F4F5F6
oklch(97% 0.002 247.8)
-
Step 100
100
#E8EAEC
oklch(93.6% 0.003 247.9)
-
Step 200
200
#D5DADE
oklch(88.6% 0.008 241.7)
-
Step 300
300
#BAC1C9
oklch(80.8% 0.014 251.6)
-
Step 400
400
#97A2AD
oklch(70.7% 0.02 248.1)
-
Step 500
500 (this color)
#818F9D
oklch(64.3% 0.027 248.2)
-
Step 600
600
#667584
oklch(55.5% 0.029 248.4)
-
Step 700
700
#556270
oklch(49% 0.028 250.3)
-
Step 800
800
#46505B
oklch(42.7% 0.022 250.8)
-
Step 900
900
#3B434B
oklch(37.9% 0.017 248.3)
-
Step 950
950
#22272C
oklch(27% 0.012 248.3)
#818F9D 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) | #8A8F9E | 0.013 |
| Deuteranopia (no green cones) | #868C9D | 0.010 |
| Tritanopia (no blue cones) | #7A9293 | 0.022 |
| Achromatopsia (no color) | #8D8D8D | 0.027 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #818F9D
#818F9D
oklch(64.3% 0.027 248.2)
- #988B7C
#988B7C
oklch(64.4% 0.027 71.3)
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 #818F9D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Grey #758DA3 ΔE 0.020
- Silver Lake Blue #778DA9 ΔE 0.024
- Light Slate Gray #778899 ΔE 0.025
- Steel #738595 ΔE 0.036
- Cool Gray #8D99AE ΔE 0.038
- Warm Grey #978A84 ΔE 0.044
- Lavender Gray #7E7F9A ΔE 0.045
- Purpley Grey #947E94 ΔE 0.050
Use #818F9D 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.