#455B5E
Closest named color: YInMn Blue (#415A77). oklch(45.4% 0.027 206.6), rgb(69, 91, 94).
Aa
White text reads best on this color (7.21:1).
About this color
#455B5E 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 YInMn Blue (#415A77), ΔE 0.043 away. White text reads best on it, at 7.21:1.
| Hue family | Neutrals |
| Lightness | medium-dark (45%) |
| Chroma | close to neutral grey (0.027) |
| Temperature | neutral |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.91:1 |
| White text | 7.21:1 |
Values
| HEX | #455B5E |
| RGB | rgb(69, 91, 94) |
| HSL | hsl(187, 15%, 32%) |
| OKLCH | oklch(45.4% 0.027 206.6) |
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 #455B5E | 7.21:1 | AAA | Lc -89.9 | Fine for body text |
| Black text on #455B5E | 2.91:1 | Fails | Lc 19.0 | Dividers and decoration only |
| #455B5E text on white | 7.21:1 | AAA | Lc 85.0 | Fine for body text |
| #455B5E text on black | 2.91:1 | Fails | Lc -17.0 | 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
#E6EBEB
oklch(93.6% 0.005 197.1)
-
Step 200
200
#D3DBDC
oklch(88.6% 0.009 205.9)
-
Step 300
300
#B5C4C6
oklch(80.9% 0.017 206.4)
-
Step 400
400
#8FA5A8
oklch(70.6% 0.025 206.6)
-
Step 500
500
#738F93
oklch(63% 0.032 207)
-
Step 600
600
#5B7A7E
oklch(55.7% 0.036 206)
-
Step 700
700
#4B666A
oklch(49% 0.032 207.5)
-
Step 800
800 (this color)
#455B5E
oklch(45.4% 0.027 206.6)
-
Step 900
900
#354547
oklch(37.7% 0.021 205.7)
-
Step 950
950
#1F282A
oklch(26.9% 0.013 212.7)
#455B5E 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) | #57595E | 0.026 |
| Deuteranopia (no green cones) | #53565E | 0.024 |
| Tritanopia (no blue cones) | #3D5D5C | 0.013 |
| Achromatopsia (no color) | #575757 | 0.027 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #455B5E
#455B5E
oklch(45.4% 0.027 206.6)
- #65514E
#65514E
oklch(45.4% 0.027 28.1)
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 #455B5E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.043
- Slate #516572 ΔE 0.044
- Dark Green Blue #1F6357 ΔE 0.048
- Dusty Grape #545775 ΔE 0.050
- Petrol #005F6A ΔE 0.050
- Dark Slate Gray #2F4F4F ΔE 0.053
- Dark Aqua #05696B ΔE 0.056
- Deep Teal #00555A ΔE 0.062
Use #455B5E 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.