#455A63
Closest named color: YInMn Blue (#415A77). oklch(45.4% 0.03 226), rgb(69, 90, 99).
Aa
White text reads best on this color (7.25:1).
About this color
#455A63 is a medium-dark close to neutral grey. In OKLCH its lightness is 45%, its chroma 0.030. It has too little chroma to lean warm or cool. The nearest named color is YInMn Blue (#415A77), ΔE 0.033 away. White text reads best on it, at 7.25:1.
| Hue family | Neutrals |
| Lightness | medium-dark (45%) |
| Chroma | close to neutral grey (0.030) |
| Temperature | neutral |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.89:1 |
| White text | 7.25:1 |
Values
| HEX | #455A63 |
| RGB | rgb(69, 90, 99) |
| HSL | hsl(198, 18%, 33%) |
| OKLCH | oklch(45.4% 0.03 226) |
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 #455A63 | 7.25:1 | AAA | Lc -90.1 | Preferred for body text |
| Black text on #455A63 | 2.89:1 | Fails | Lc 18.8 | Dividers and decoration only |
| #455A63 text on white | 7.25:1 | AAA | Lc 85.2 | Fine for body text |
| #455A63 text on black | 2.89:1 | Fails | Lc -16.8 | 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
#F4F6F7
oklch(97.2% 0.003 228.8)
-
Step 100
100
#E6EBEC
oklch(93.7% 0.006 211)
-
Step 200
200
#D3DADE
oklch(88.4% 0.009 232.4)
-
Step 300
300
#B6C3C9
oklch(80.9% 0.017 227)
-
Step 400
400
#8FA5AE
oklch(70.8% 0.028 224.4)
-
Step 500
500
#738E9A
oklch(63% 0.036 226.7)
-
Step 600
600
#5C7885
oklch(55.6% 0.038 228)
-
Step 700
700
#4B6570
oklch(49% 0.035 225.8)
-
Step 800
800 (this color)
#455A63
oklch(45.4% 0.03 226)
-
Step 900
900
#35444B
oklch(37.6% 0.023 228)
-
Step 950
950
#1F282C
oklch(27% 0.015 226.6)
#455A63 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) | #555964 | 0.023 |
| Deuteranopia (no green cones) | #515563 | 0.022 |
| Tritanopia (no blue cones) | #3C5D5D | 0.020 |
| Achromatopsia (no color) | #575757 | 0.030 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #455A63
#455A63
oklch(45.4% 0.03 226)
- #655249
#655249
oklch(45.5% 0.029 46.8)
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 #455A63, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.033
- Dusty Grape #545775 ΔE 0.041
- Slate #516572 ΔE 0.042
- Petrol #005F6A ΔE 0.050
- Dark Slate Gray #2F4F4F ΔE 0.054
- Dark Green Blue #1F6357 ΔE 0.054
- Dark Aqua #05696B ΔE 0.059
- Dusk #4E5481 ΔE 0.060
Use #455A63 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.