#455D5B
Closest named color: Dark Green Blue (#1F6357). oklch(45.8% 0.029 189.8), rgb(69, 93, 91).
Aa
White text reads best on this color (7.07:1).
About this color
#455D5B is a medium-dark close to neutral grey. In OKLCH its lightness is 46%, its chroma 0.029. It has too little chroma to lean warm or cool. The nearest named color is Dark Green Blue (#1F6357), ΔE 0.042 away. White text reads best on it, at 7.07:1.
| Hue family | Neutrals |
| Lightness | medium-dark (46%) |
| Chroma | close to neutral grey (0.029) |
| Temperature | neutral |
| Nearest name | Dark Green Blue (#1F6357) |
| Black text | 2.96:1 |
| White text | 7.07:1 |
Values
| HEX | #455D5B |
| RGB | rgb(69, 93, 91) |
| HSL | hsl(175, 15%, 32%) |
| OKLCH | oklch(45.8% 0.029 189.8) |
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 #455D5B | 7.07:1 | AAA | Lc -89.4 | Fine for body text |
| Black text on #455D5B | 2.96:1 | Fails | Lc 19.5 | Dividers and decoration only |
| #455D5B text on white | 7.07:1 | AAA | Lc 84.5 | Fine for body text |
| #455D5B text on black | 2.96:1 | Fails | Lc -17.5 | 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
#E6EBEA
oklch(93.6% 0.006 183)
-
Step 200
200
#D2DBDA
oklch(88.4% 0.01 189)
-
Step 300
300
#B5C4C3
oklch(80.9% 0.017 192)
-
Step 400
400
#8EA6A4
oklch(70.6% 0.027 190.4)
-
Step 500
500
#72918E
oklch(63.2% 0.035 189)
-
Step 600
600
#5A7B78
oklch(55.7% 0.038 189.1)
-
Step 700
700
#4A6765
oklch(49% 0.034 190.8)
-
Step 800
800 (this color)
#455D5B
oklch(45.8% 0.029 189.8)
-
Step 900
900
#344644
oklch(37.8% 0.023 187.8)
-
Step 950
950
#1F2928
oklch(27.1% 0.014 188.9)
#455D5B 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) | #5A5A5B | 0.031 |
| Deuteranopia (no green cones) | #56575B | 0.029 |
| Tritanopia (no blue cones) | #3E5E5C | 0.009 |
| Achromatopsia (no color) | #585858 | 0.029 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #455D5B
#455D5B
oklch(45.8% 0.029 189.8)
- #675154
#675154
oklch(45.9% 0.03 9.1)
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 #455D5B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Green Blue #1F6357 ΔE 0.042
- Slate #516572 ΔE 0.044
- YInMn Blue #415A77 ΔE 0.050
- Petrol #005F6A ΔE 0.052
- Dark Aqua #05696B ΔE 0.053
- Dark Slate Gray #2F4F4F ΔE 0.056
- Dusty Grape #545775 ΔE 0.057
- Deep Teal #00555A ΔE 0.064
Use #455D5B 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.