#455B58
Closest named color: Dark Green Blue (#1F6357). oklch(45.2% 0.027 186), rgb(69, 91, 88).
Aa
White text reads best on this color (7.26:1).
About this color
#455B58 is a medium-dark close to neutral grey. In OKLCH its lightness is 45%, its chroma 0.027. It has too little chroma to lean warm or cool. The nearest named color is Dark Green Blue (#1F6357), ΔE 0.043 away. White text reads best on it, at 7.26:1.
| Hue family | Neutrals |
| Lightness | medium-dark (45%) |
| Chroma | close to neutral grey (0.027) |
| Temperature | neutral |
| Nearest name | Dark Green Blue (#1F6357) |
| Black text | 2.89:1 |
| White text | 7.26:1 |
Values
| HEX | #455B58 |
| RGB | rgb(69, 91, 88) |
| HSL | hsl(172, 14%, 31%) |
| OKLCH | oklch(45.2% 0.027 186) |
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 #455B58 | 7.26:1 | AAA | Lc -90.1 | Preferred for body text |
| Black text on #455B58 | 2.89:1 | Fails | Lc 18.8 | Dividers and decoration only |
| #455B58 text on white | 7.26:1 | AAA | Lc 85.2 | Fine for body text |
| #455B58 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
#F4F6F5
oklch(97.1% 0.002 165.1)
-
Step 100
100
#E7EBEA
oklch(93.7% 0.004 179.7)
-
Step 200
200
#D3DBDA
oklch(88.5% 0.009 188.1)
-
Step 300
300
#B6C4C2
oklch(80.9% 0.016 186.6)
-
Step 400
400
#90A6A3
oklch(70.7% 0.025 186.6)
-
Step 500
500
#74908C
oklch(63.1% 0.032 185.8)
-
Step 600
600
#5C7A76
oklch(55.5% 0.035 186.1)
-
Step 700
700
#4C6763
oklch(49.1% 0.033 184.9)
-
Step 800
800 (this color)
#455B58
oklch(45.2% 0.027 186)
-
Step 900
900
#354543
oklch(37.6% 0.021 186.9)
-
Step 950
950
#1F2927
oklch(27.1% 0.014 181.6)
#455B58 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) | #595958 | 0.029 |
| Deuteranopia (no green cones) | #545558 | 0.027 |
| Tritanopia (no blue cones) | #3F5C5A | 0.008 |
| Achromatopsia (no color) | #575757 | 0.028 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #455B58
#455B58
oklch(45.2% 0.027 186)
- #645053
#645053
oklch(45.3% 0.027 8.1)
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 #455B58, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Green Blue #1F6357 ΔE 0.043
- Slate #516572 ΔE 0.050
- Dark Slate Gray #2F4F4F ΔE 0.051
- YInMn Blue #415A77 ΔE 0.053
- Petrol #005F6A ΔE 0.053
- Dark Aqua #05696B ΔE 0.057
- Dusty Grape #545775 ΔE 0.059
- Deep Teal #00555A ΔE 0.062
Use #455B58 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.