#3A4658
Closest named color: Dark Grey Blue (#29465B). oklch(39.1% 0.034 258.3), rgb(58, 70, 88).
Aa
White text reads best on this color (9.55:1).
About this color
#3A4658 is a dark, muted blue. In OKLCH its lightness is 39%, its chroma 0.034 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.022 away. White text reads best on it, at 9.55:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | muted (0.034) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.19:1 |
| White text | 9.55:1 |
Values
| HEX | #3A4658 |
| RGB | rgb(58, 70, 88) |
| HSL | hsl(216, 21%, 29%) |
| OKLCH | oklch(39.1% 0.034 258.3) |
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 #3A4658 | 9.55:1 | AAA | Lc -96.4 | Preferred for body text |
| Black text on #3A4658 | 2.19:1 | Fails | Lc 11.8 | Not readable |
| #3A4658 text on white | 9.55:1 | AAA | Lc 92.1 | Preferred for body text |
| #3A4658 text on black | 2.19:1 | Fails | Lc -10.3 | 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 900.
-
Step 50
50
#F4F5F8
oklch(97% 0.004 271.4)
-
Step 100
100
#E7EAEF
oklch(93.6% 0.007 260.7)
-
Step 200
200
#D3DAE3
oklch(88.6% 0.015 254.6)
-
Step 300
300
#B7C1D2
oklch(80.8% 0.026 261.1)
-
Step 400
400
#91A2BB
oklch(70.7% 0.041 257.9)
-
Step 500
500
#768BAA
oklch(63.2% 0.053 258)
-
Step 600
600
#5F7495
oklch(55.5% 0.057 259.3)
-
Step 700
700
#4E627F
oklch(49.2% 0.053 257.6)
-
Step 800
800
#405067
oklch(42.7% 0.043 257.4)
-
Step 900
900 (this color)
#3A4658
oklch(39.1% 0.034 258.3)
-
Step 950
950
#202731
oklch(27% 0.021 257.3)
#3A4658 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) | #404759 | 0.010 |
| Deuteranopia (no green cones) | #3D4458 | 0.007 |
| Tritanopia (no blue cones) | #314A4C | 0.031 |
| Achromatopsia (no color) | #454545 | 0.034 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3A4658
#3A4658
oklch(39.1% 0.034 258.3)
- #504330
#504330
oklch(39.1% 0.035 76.9)
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 #3A4658, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.022
- Charcoal #264653 ΔE 0.028
- Charcoal Grey #3C4142 ΔE 0.036
- Dark Slate Gray #2F4F4F ΔE 0.039
- Onyx #343A40 ΔE 0.051
- Dark Blue Grey #1F3B4D ΔE 0.055
- Dark Teal #014D4E ΔE 0.058
- Deep Teal #00555A ΔE 0.061
Use #3A4658 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.