#878F9B
Closest named color: Blue Grey (#758DA3). oklch(64.7% 0.02 258.4), rgb(135, 143, 155).
Aa
Black text reads best on this color (6.43:1).
About this color
#878F9B is a medium-light close to neutral grey. In OKLCH its lightness is 65%, its chroma 0.020. It has too little chroma to lean warm or cool. The nearest named color is Blue Grey (#758DA3), ΔE 0.028 away. Black text reads best on it, at 6.43:1.
| Hue family | Neutrals |
| Lightness | medium-light (65%) |
| Chroma | close to neutral grey (0.020) |
| Temperature | neutral |
| Nearest name | Blue Grey (#758DA3) |
| Black text | 6.43:1 |
| White text | 3.26:1 |
Values
| HEX | #878F9B |
| RGB | rgb(135, 143, 155) |
| HSL | hsl(216, 9%, 57%) |
| OKLCH | oklch(64.7% 0.02 258.4) |
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 #878F9B | 3.26:1 | AA large text | Lc -65.4 | Content text, not long reading |
| Black text on #878F9B | 6.43:1 | AA | Lc 44.1 | Non-text elements, placeholder text |
| #878F9B text on white | 3.26:1 | AA large text | Lc 60.0 | Large or bold text, headings |
| #878F9B text on black | 6.43:1 | AA | Lc -41.7 | 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
#F5F5F6
oklch(97% 0.001 286.4)
-
Step 100
100
#E9EAEC
oklch(93.7% 0.003 264.5)
-
Step 200
200
#D7D9DD
oklch(88.5% 0.006 264.5)
-
Step 300
300
#BDC1C7
oklch(81% 0.01 258.3)
-
Step 400
400
#9BA1AB
oklch(70.7% 0.016 260.7)
-
Step 500
500 (this color)
#878F9B
oklch(64.7% 0.02 258.4)
-
Step 600
600
#6C7480
oklch(55.6% 0.021 258.4)
-
Step 700
700
#5A616D
oklch(49.1% 0.021 261.3)
-
Step 800
800
#494F58
oklch(42.6% 0.017 258.4)
-
Step 900
900
#3D4249
oklch(37.7% 0.014 256.8)
-
Step 950
950
#24272B
oklch(27.1% 0.009 255.6)
#878F9B 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) | #8B8F9C | 0.006 |
| Deuteranopia (no green cones) | #898D9B | 0.006 |
| Tritanopia (no blue cones) | #829193 | 0.017 |
| Achromatopsia (no color) | #8E8E8E | 0.020 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #878F9B
#878F9B
oklch(64.7% 0.02 258.4)
- #958D81
#958D81
oklch(64.7% 0.02 78.2)
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 #878F9B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Grey #758DA3 ΔE 0.028
- Silver Lake Blue #778DA9 ΔE 0.031
- Light Slate Gray #778899 ΔE 0.031
- Cool Gray #8D99AE ΔE 0.036
- Warm Grey #978A84 ΔE 0.037
- Steel #738595 ΔE 0.042
- Purpley Grey #947E94 ΔE 0.047
- English Lavender #9D8189 ΔE 0.047
Use #878F9B 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.