#878BA5
Closest named color: Silver Lake Blue (#778DA9). oklch(64.2% 0.039 278.3), rgb(135, 139, 165).
Aa
Black text reads best on this color (6.26:1).
About this color
#878BA5 is a medium-light, muted blue. In OKLCH its lightness is 64%, its chroma 0.039 and its hue 278°. Its hue sits on the cool side of the wheel. The nearest named color is Silver Lake Blue (#778DA9), ΔE 0.022 away. Black text reads best on it, at 6.26:1.
| Hue family | Blues |
| Lightness | medium-light (64%) |
| Chroma | muted (0.039) |
| Temperature | cool |
| Nearest name | Silver Lake Blue (#778DA9) |
| Black text | 6.26:1 |
| White text | 3.35:1 |
Values
| HEX | #878BA5 |
| RGB | rgb(135, 139, 165) |
| HSL | hsl(232, 14%, 59%) |
| OKLCH | oklch(64.2% 0.039 278.3) |
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 #878BA5 | 3.35:1 | AA large text | Lc -66.4 | Content text, not long reading |
| Black text on #878BA5 | 6.26:1 | AA | Lc 43.1 | Non-text elements, placeholder text |
| #878BA5 text on white | 3.35:1 | AA large text | Lc 61.0 | Content text, not long reading |
| #878BA5 text on black | 6.26:1 | AA | Lc -40.7 | 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
#F5F5F7
oklch(97.1% 0.003 286.4)
-
Step 100
100
#E9E9EE
oklch(93.5% 0.007 286.3)
-
Step 200
200
#D7D8E0
oklch(88.4% 0.011 280.5)
-
Step 300
300
#BDC0CD
oklch(80.9% 0.018 275.6)
-
Step 400
400
#9C9FB4
oklch(70.7% 0.031 279.1)
-
Step 500
500 (this color)
#878BA5
oklch(64.2% 0.039 278.3)
-
Step 600
600
#6D718C
oklch(55.5% 0.042 278.3)
-
Step 700
700
#5B5F77
oklch(49.1% 0.039 277.5)
-
Step 800
800
#4B4D61
oklch(42.6% 0.033 280.4)
-
Step 900
900
#3E404F
oklch(37.6% 0.026 279.1)
-
Step 950
950
#24262E
oklch(27% 0.015 274.3)
#878BA5 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) | #848DA6 | 0.006 |
| Deuteranopia (no green cones) | #838BA4 | 0.006 |
| Tritanopia (no blue cones) | #809094 | 0.035 |
| Achromatopsia (no color) | #8C8C8C | 0.039 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #878BA5
#878BA5
oklch(64.2% 0.039 278.3)
- #938E73
#938E73
oklch(64.4% 0.039 98.7)
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 #878BA5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Silver Lake Blue #778DA9 ΔE 0.022
- Blue Grey #758DA3 ΔE 0.025
- Light Slate Gray #778899 ΔE 0.031
- Lavender Gray #7E7F9A ΔE 0.037
- Purpley Grey #947E94 ΔE 0.039
- Cool Gray #8D99AE ΔE 0.040
- Steel #738595 ΔE 0.041
- Heather #A484AC ΔE 0.049
Use #878BA5 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.