#3A5063
Closest named color: Dark Slate Gray (#2F4F4F). oklch(42.1% 0.042 245.1), rgb(58, 80, 99).
Aa
White text reads best on this color (8.37:1).
About this color
#3A5063 is a dark, muted blue. In OKLCH its lightness is 42%, its chroma 0.042 and its hue 245°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.038 away. White text reads best on it, at 8.37:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | muted (0.042) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.50:1 |
| White text | 8.37:1 |
Values
| HEX | #3A5063 |
| RGB | rgb(58, 80, 99) |
| HSL | hsl(208, 26%, 31%) |
| OKLCH | oklch(42.1% 0.042 245.1) |
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 #3A5063 | 8.37:1 | AAA | Lc -93.4 | Preferred for body text |
| Black text on #3A5063 | 2.50:1 | Fails | Lc 15.1 | Dividers and decoration only |
| #3A5063 text on white | 8.37:1 | AAA | Lc 88.8 | Fine for body text |
| #3A5063 text on black | 2.50:1 | Fails | Lc -13.4 | Not readable |
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
#F4F6F7
oklch(97.2% 0.003 228.8)
-
Step 100
100
#E6EAEE
oklch(93.5% 0.007 247.9)
-
Step 200
200
#D2DAE2
oklch(88.5% 0.014 248)
-
Step 300
300
#B4C3D0
oklch(81% 0.025 244.2)
-
Step 400
400
#8DA4B8
oklch(70.8% 0.039 244.6)
-
Step 500
500
#708DA6
oklch(63% 0.05 244.7)
-
Step 600
600
#587791
oklch(55.6% 0.054 244.3)
-
Step 700
700
#48647C
oklch(49.1% 0.051 245)
-
Step 800
800 (this color)
#3A5063
oklch(42.1% 0.042 245.1)
-
Step 900
900
#334452
oklch(37.8% 0.032 243.6)
-
Step 950
950
#1E2830
oklch(27.1% 0.02 242.7)
#3A5063 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) | #485064 | 0.020 |
| Deuteranopia (no green cones) | #434C63 | 0.017 |
| Tritanopia (no blue cones) | #2B5556 | 0.036 |
| Achromatopsia (no color) | #4E4E4E | 0.042 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3A5063
#3A5063
oklch(42.1% 0.042 245.1)
- #5E4935
#5E4935
oklch(42.2% 0.042 64.9)
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 #3A5063, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.038
- Dark Grey Blue #29465B ΔE 0.041
- YInMn Blue #415A77 ΔE 0.042
- Charcoal #264653 ΔE 0.048
- Deep Teal #00555A ΔE 0.050
- Dusty Grape #545775 ΔE 0.053
- Petrol #005F6A ΔE 0.055
- Dusk #4E5481 ΔE 0.059
Use #3A5063 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.