#57839B
Closest named color: Grey Blue (#647D8E). oklch(58.7% 0.061 233.1), rgb(87, 131, 155).
Aa
Black text reads best on this color (5.12:1).
About this color
#57839B is a medium-dark, muted blue. In OKLCH its lightness is 59%, its chroma 0.061 and its hue 233°. Its hue sits on the cool side of the wheel. The nearest named color is Grey Blue (#647D8E), ΔE 0.025 away. Black text reads best on it, at 5.12:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | muted (0.061) |
| Temperature | cool |
| Nearest name | Grey Blue (#647D8E) |
| Black text | 5.12:1 |
| White text | 4.09:1 |
Values
| HEX | #57839B |
| RGB | rgb(87, 131, 155) |
| HSL | hsl(201, 28%, 47%) |
| OKLCH | oklch(58.7% 0.061 233.1) |
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 #57839B | 4.09:1 | AA large text | Lc -73.6 | Content text, not long reading |
| Black text on #57839B | 5.12:1 | AA | Lc 36.0 | Non-text elements, placeholder text |
| #57839B text on white | 4.09:1 | AA large text | Lc 68.1 | Content text, not long reading |
| #57839B text on black | 5.12:1 | AA | Lc -33.6 | Non-text elements, placeholder text |
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 600.
-
Step 50
50
#F3F6F7
oklch(97.1% 0.003 219.5)
-
Step 100
100
#E5EBEE
oklch(93.6% 0.008 228.9)
-
Step 200
200
#D0DBE2
oklch(88.5% 0.015 235.4)
-
Step 300
300
#B0C4D0
oklch(80.9% 0.028 234.1)
-
Step 400
400
#86A6B8
oklch(70.7% 0.044 232.8)
-
Step 500
500
#6790A6
oklch(63.1% 0.056 232.2)
-
Step 600
600 (this color)
#57839B
oklch(58.7% 0.061 233.1)
-
Step 700
700
#3F667C
oklch(49% 0.057 234.3)
-
Step 800
800
#345465
oklch(42.8% 0.047 232.6)
-
Step 900
900
#2E4552
oklch(37.7% 0.036 233.8)
-
Step 950
950
#1B2830
oklch(26.9% 0.023 235.8)
#57839B 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) | #78829C | 0.042 |
| Deuteranopia (no green cones) | #6E7A9B | 0.036 |
| Tritanopia (no blue cones) | #3B8A8B | 0.046 |
| Achromatopsia (no color) | #7D7D7D | 0.061 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #57839B
#57839B
oklch(58.7% 0.061 233.1)
- #9A735B
#9A735B
oklch(58.8% 0.061 52.8)
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 #57839B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grey Blue #647D8E ΔE 0.025
- Stormy Blue #507B9C ΔE 0.026
- Dusty Blue #5A86AD ΔE 0.028
- Off Blue #5684AE ΔE 0.029
- Slate Gray #708090 ΔE 0.032
- Cerulean #457B9D ΔE 0.033
- Steel #738595 ΔE 0.036
- Steel Grey #6F828A ΔE 0.036
Use #57839B 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.