#455B63
Closest named color: YInMn Blue (#415A77). oklch(45.6% 0.03 222.2), rgb(69, 91, 99).
Aa
White text reads best on this color (7.16:1).
About this color
#455B63 is a medium-dark close to neutral grey. In OKLCH its lightness is 46%, its chroma 0.030. It has too little chroma to lean warm or cool. The nearest named color is YInMn Blue (#415A77), ΔE 0.035 away. White text reads best on it, at 7.16:1.
| Hue family | Neutrals |
| Lightness | medium-dark (46%) |
| Chroma | close to neutral grey (0.030) |
| Temperature | neutral |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.92:1 |
| White text | 7.16:1 |
Values
| HEX | #455B63 |
| RGB | rgb(69, 91, 99) |
| HSL | hsl(196, 18%, 33%) |
| OKLCH | oklch(45.6% 0.03 222.2) |
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 #455B63 | 7.16:1 | AAA | Lc -89.8 | Fine for body text |
| Black text on #455B63 | 2.92:1 | Fails | Lc 19.2 | Dividers and decoration only |
| #455B63 text on white | 7.16:1 | AAA | Lc 84.9 | Fine for body text |
| #455B63 text on black | 2.92:1 | Fails | Lc -17.1 | Dividers and decoration only |
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 800.
-
Step 50
50
#F4F6F6
oklch(97.2% 0.002 197.1)
-
Step 100
100
#E6EBEC
oklch(93.7% 0.006 211)
-
Step 200
200
#D3DBDE
oklch(88.6% 0.01 222.1)
-
Step 300
300
#B5C3C9
oklch(80.8% 0.018 225.2)
-
Step 400
400
#8FA5AD
oklch(70.8% 0.027 221.7)
-
Step 500
500
#738F99
oklch(63.2% 0.035 221.6)
-
Step 600
600
#5B7984
oklch(55.7% 0.038 222.4)
-
Step 700
700
#4A666F
oklch(49.2% 0.036 219.7)
-
Step 800
800 (this color)
#455B63
oklch(45.6% 0.03 222.2)
-
Step 900
900
#34454A
oklch(37.8% 0.023 217.7)
-
Step 950
950
#1F282C
oklch(27% 0.015 226.6)
#455B63 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) | #565A63 | 0.024 |
| Deuteranopia (no green cones) | #525663 | 0.023 |
| Tritanopia (no blue cones) | #3B5E5D | 0.020 |
| Achromatopsia (no color) | #585858 | 0.030 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #455B63
#455B63
oklch(45.6% 0.03 222.2)
- #66524A
#66524A
oklch(45.7% 0.03 42.9)
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 #455B63, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.035
- Slate #516572 ΔE 0.040
- Dusty Grape #545775 ΔE 0.043
- Petrol #005F6A ΔE 0.050
- Dark Green Blue #1F6357 ΔE 0.053
- Dark Slate Gray #2F4F4F ΔE 0.056
- Dark Aqua #05696B ΔE 0.056
- Dusk #4E5481 ΔE 0.062
Use #455B63 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.