#455C57
Closest named color: Dark Green Blue (#1F6357). oklch(45.4% 0.029 180.1), rgb(69, 92, 87).
Aa
White text reads best on this color (7.18:1).
About this color
#455C57 is a medium-dark close to neutral grey. In OKLCH its lightness is 45%, its chroma 0.029. It has too little chroma to lean warm or cool. The nearest named color is Dark Green Blue (#1F6357), ΔE 0.041 away. White text reads best on it, at 7.18:1.
| Hue family | Neutrals |
| Lightness | medium-dark (45%) |
| Chroma | close to neutral grey (0.029) |
| Temperature | neutral |
| Nearest name | Dark Green Blue (#1F6357) |
| Black text | 2.92:1 |
| White text | 7.18:1 |
Values
| HEX | #455C57 |
| RGB | rgb(69, 92, 87) |
| HSL | hsl(167, 14%, 32%) |
| OKLCH | oklch(45.4% 0.029 180.1) |
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 #455C57 | 7.18:1 | AAA | Lc -89.8 | Fine for body text |
| Black text on #455C57 | 2.92:1 | Fails | Lc 19.1 | Dividers and decoration only |
| #455C57 text on white | 7.18:1 | AAA | Lc 84.9 | Fine for body text |
| #455C57 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
#F4F6F5
oklch(97.1% 0.002 165.1)
-
Step 100
100
#E6EBEA
oklch(93.6% 0.006 183)
-
Step 200
200
#D3DBD9
oklch(88.5% 0.009 179.6)
-
Step 300
300
#B6C4C1
oklch(80.9% 0.016 181.7)
-
Step 400
400
#8FA6A1
oklch(70.6% 0.027 180.9)
-
Step 500
500
#73918A
oklch(63.2% 0.035 179.3)
-
Step 600
600
#5B7B74
oklch(55.6% 0.038 179.9)
-
Step 700
700
#4B6761
oklch(49% 0.034 180.1)
-
Step 800
800 (this color)
#455C57
oklch(45.4% 0.029 180.1)
-
Step 900
900
#354642
oklch(37.8% 0.023 179)
-
Step 950
950
#1F2927
oklch(27.1% 0.014 181.6)
#455C57 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) | #5A5957 | 0.031 |
| Deuteranopia (no green cones) | #565657 | 0.030 |
| Tritanopia (no blue cones) | #3F5D5A | 0.008 |
| Achromatopsia (no color) | #575757 | 0.029 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #455C57
#455C57
oklch(45.4% 0.029 180.1)
- #655056
#655056
oklch(45.5% 0.029 359.4)
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 #455C57, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Green Blue #1F6357 ΔE 0.041
- Slate #516572 ΔE 0.050
- Dark Slate Gray #2F4F4F ΔE 0.053
- Petrol #005F6A ΔE 0.054
- Dark Aqua #05696B ΔE 0.055
- YInMn Blue #415A77 ΔE 0.055
- Dusty Grape #545775 ΔE 0.062
- Deep Teal #00555A ΔE 0.063
Use #455C57 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.