#878CA3
Closest named color: Silver Lake Blue (#778DA9). oklch(64.4% 0.035 275.7), rgb(135, 140, 163).
Aa
Black text reads best on this color (6.31:1).
About this color
#878CA3 is a medium-light, muted blue. In OKLCH its lightness is 64%, its chroma 0.035 and its hue 276°. 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 6.31:1.
| Hue family | Blues |
| Lightness | medium-light (64%) |
| Chroma | muted (0.035) |
| Temperature | cool |
| Nearest name | Silver Lake Blue (#778DA9) |
| Black text | 6.31:1 |
| White text | 3.32:1 |
Values
| HEX | #878CA3 |
| RGB | rgb(135, 140, 163) |
| HSL | hsl(229, 13%, 58%) |
| OKLCH | oklch(64.4% 0.035 275.7) |
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 #878CA3 | 3.32:1 | AA large text | Lc -66.2 | Content text, not long reading |
| Black text on #878CA3 | 6.31:1 | AA | Lc 43.4 | Non-text elements, placeholder text |
| #878CA3 text on white | 3.32:1 | AA large text | Lc 60.7 | Content text, not long reading |
| #878CA3 text on black | 6.31:1 | AA | Lc -41.0 | 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
#E9EAED
oklch(93.7% 0.004 271.4)
-
Step 200
200
#D7D9DF
oklch(88.6% 0.008 271.3)
-
Step 300
300
#BDC0CC
oklch(80.9% 0.017 274.8)
-
Step 400
400
#9BA0B2
oklch(70.8% 0.027 273.4)
-
Step 500
500 (this color)
#878CA3
oklch(64.4% 0.035 275.7)
-
Step 600
600
#6D728A
oklch(55.7% 0.038 275.9)
-
Step 700
700
#5B5F75
oklch(49% 0.036 276.9)
-
Step 800
800
#4A4E5F
oklch(42.7% 0.029 274.7)
-
Step 900
900
#3E414E
oklch(37.8% 0.023 275)
-
Step 950
950
#24262E
oklch(27% 0.015 274.3)
#878CA3 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) | #868EA4 | 0.005 |
| Deuteranopia (no green cones) | #848CA2 | 0.005 |
| Tritanopia (no blue cones) | #819093 | 0.032 |
| Achromatopsia (no color) | #8D8D8D | 0.035 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #878CA3
#878CA3
oklch(64.4% 0.035 275.7)
- #938E76
#938E76
oklch(64.4% 0.035 97.5)
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 #878CA3, 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 0.024
- Light Slate Gray #778899 ΔE 0.030
- Cool Gray #8D99AE ΔE 0.038
- Lavender Gray #7E7F9A ΔE 0.039
- Steel #738595 ΔE 0.040
- Purpley Grey #947E94 ΔE 0.040
- Warm Grey #978A84 ΔE 0.049
Use #878CA3 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.