#51597E
Closest named color: Dusty Grape (#545775). oklch(47.3% 0.061 274.5), rgb(81, 89, 126).
Aa
White text reads best on this color (6.81:1).
About this color
#51597E is a medium-dark, muted blue. In OKLCH its lightness is 47%, its chroma 0.061 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Dusty Grape (#545775), ΔE 0.015 away. White text reads best on it, at 6.81:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | muted (0.061) |
| Temperature | cool |
| Nearest name | Dusty Grape (#545775) |
| Black text | 3.08:1 |
| White text | 6.81:1 |
Values
| HEX | #51597E |
| RGB | rgb(81, 89, 126) |
| HSL | hsl(229, 22%, 41%) |
| OKLCH | oklch(47.3% 0.061 274.5) |
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 #51597E | 6.81:1 | AA | Lc -88.5 | Fine for body text |
| Black text on #51597E | 3.08:1 | AA large text | Lc 20.5 | Dividers and decoration only |
| #51597E text on white | 6.81:1 | AA | Lc 83.5 | Fine for body text |
| #51597E text on black | 3.08:1 | AA large text | Lc -18.4 | 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 700.
-
Step 50
50
#F4F5F8
oklch(97% 0.004 271.4)
-
Step 100
100
#E8E9F0
oklch(93.5% 0.009 279.7)
-
Step 200
200
#D6D9E4
oklch(88.6% 0.015 273.8)
-
Step 300
300
#BAC0D4
oklch(80.9% 0.029 272.4)
-
Step 400
400
#979FBF
oklch(70.7% 0.048 274.1)
-
Step 500
500
#7E87AE
oklch(63% 0.06 274.5)
-
Step 600
600
#67719A
oklch(55.7% 0.065 273.5)
-
Step 700
700 (this color)
#51597E
oklch(47.3% 0.061 274.5)
-
Step 800
800
#464D6B
oklch(42.7% 0.051 273.9)
-
Step 900
900
#3B4057
oklch(37.7% 0.04 274.8)
-
Step 950
950
#232633
oklch(27.1% 0.025 274.5)
#51597E 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) | #4D5D80 | 0.012 |
| Deuteranopia (no green cones) | #4A597D | 0.010 |
| Tritanopia (no blue cones) | #446066 | 0.054 |
| Achromatopsia (no color) | #5B5B5B | 0.061 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51597E
#51597E
oklch(47.3% 0.061 274.5)
- #665B32
#665B32
oklch(47.2% 0.061 94.8)
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 #51597E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusty Grape #545775 ΔE 0.015
- Dusk #4E5481 ΔE 0.018
- YInMn Blue #415A77 ΔE 0.026
- Twilight #4E518B ΔE 0.036
- Dusky Blue #475F94 ΔE 0.037
- Denim #3B638C ΔE 0.039
- Denim Blue #3B5B92 ΔE 0.041
- Light Navy Blue #2E5A88 ΔE 0.044
Use #51597E 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.