#818CA5
Closest named color: Silver Lake Blue (#778DA9). oklch(64% 0.04 266.5), rgb(129, 140, 165).
Aa
Black text reads best on this color (6.22:1).
About this color
#818CA5 is a medium-light, muted blue. In OKLCH its lightness is 64%, its chroma 0.040 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Silver Lake Blue (#778DA9), ΔE 0.014 away. Black text reads best on it, at 6.22:1.
| Hue family | Blues |
| Lightness | medium-light (64%) |
| Chroma | muted (0.040) |
| Temperature | cool |
| Nearest name | Silver Lake Blue (#778DA9) |
| Black text | 6.22:1 |
| White text | 3.37:1 |
Values
| HEX | #818CA5 |
| RGB | rgb(129, 140, 165) |
| HSL | hsl(222, 17%, 58%) |
| OKLCH | oklch(64% 0.04 266.5) |
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 #818CA5 | 3.37:1 | AA large text | Lc -66.7 | Content text, not long reading |
| Black text on #818CA5 | 6.22:1 | AA | Lc 42.9 | Non-text elements, placeholder text |
| #818CA5 text on white | 3.37:1 | AA large text | Lc 61.2 | Content text, not long reading |
| #818CA5 text on black | 6.22:1 | AA | Lc -40.5 | 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
#F4F5F7
oklch(97% 0.003 264.5)
-
Step 100
100
#E8EAEE
oklch(93.7% 0.006 264.5)
-
Step 200
200
#D6D9E0
oklch(88.5% 0.01 267.4)
-
Step 300
300
#BBC1CE
oklch(81% 0.019 266)
-
Step 400
400
#98A1B5
oklch(70.8% 0.031 266.3)
-
Step 500
500 (this color)
#818CA5
oklch(64% 0.04 266.5)
-
Step 600
600
#68738D
oklch(55.6% 0.043 267)
-
Step 700
700
#566078
oklch(49% 0.041 267.2)
-
Step 800
800
#474F62
oklch(42.8% 0.033 267.1)
-
Step 900
900
#3B4150
oklch(37.6% 0.027 268)
-
Step 950
950
#23262F
oklch(26.9% 0.017 270.7)
#818CA5 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) | #848EA6 | 0.007 |
| Deuteranopia (no green cones) | #818AA4 | 0.005 |
| Tritanopia (no blue cones) | #789194 | 0.036 |
| Achromatopsia (no color) | #8C8C8C | 0.040 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #818CA5
#818CA5
oklch(64% 0.04 266.5)
- #978B71
#978B71
oklch(64% 0.04 86.1)
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 #818CA5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Silver Lake Blue #778DA9 ΔE 0.014
- Blue Grey #758DA3 ΔE 0.017
- Light Slate Gray #778899 ΔE 0.025
- Steel #738595 ΔE 0.035
- Lavender Gray #7E7F9A ΔE 0.037
- Cool Gray #8D99AE ΔE 0.041
- Purpley Grey #947E94 ΔE 0.045
- Faded Blue #658CBB ΔE 0.047
Use #818CA5 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.