#3E4757
Closest named color: Dark Grey Blue (#29465B). oklch(39.6% 0.03 261.9), rgb(62, 71, 87).
Aa
White text reads best on this color (9.35:1).
About this color
#3E4757 is a dark close to neutral grey. In OKLCH its lightness is 40%, its chroma 0.030. It has too little chroma to lean warm or cool. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.029 away. White text reads best on it, at 9.35:1.
| Hue family | Neutrals |
| Lightness | dark (40%) |
| Chroma | close to neutral grey (0.030) |
| Temperature | neutral |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.24:1 |
| White text | 9.35:1 |
Values
| HEX | #3E4757 |
| RGB | rgb(62, 71, 87) |
| HSL | hsl(218, 17%, 29%) |
| OKLCH | oklch(39.6% 0.03 261.9) |
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 #3E4757 | 9.35:1 | AAA | Lc -95.9 | Preferred for body text |
| Black text on #3E4757 | 2.24:1 | Fails | Lc 12.3 | Not readable |
| #3E4757 text on white | 9.35:1 | AAA | Lc 91.6 | Preferred for body text |
| #3E4757 text on black | 2.24:1 | Fails | Lc -10.7 | 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
#F4F5F7
oklch(97% 0.003 264.5)
-
Step 100
100
#E7EAEE
oklch(93.6% 0.006 255.5)
-
Step 200
200
#D5D9E1
oklch(88.5% 0.012 264.5)
-
Step 300
300
#B9C1CF
oklch(80.9% 0.022 261.8)
-
Step 400
400
#95A1B7
oklch(70.7% 0.035 262.6)
-
Step 500
500
#7B8AA6
oklch(63.1% 0.046 262.9)
-
Step 600
600
#647491
oklch(55.7% 0.049 262.2)
-
Step 700
700
#52617B
oklch(49% 0.046 261.3)
-
Step 800
800
#444F64
oklch(42.7% 0.038 263.2)
-
Step 900
900 (this color)
#3E4757
oklch(39.6% 0.03 261.9)
-
Step 950
950
#212730
oklch(27.1% 0.019 258.4)
#3E4757 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) | #424858 | 0.007 |
| Deuteranopia (no green cones) | #3F4657 | 0.003 |
| Tritanopia (no blue cones) | #374A4C | 0.026 |
| Achromatopsia (no color) | #474747 | 0.030 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3E4757
#3E4757
oklch(39.6% 0.03 261.9)
- #4F4535
#4F4535
oklch(39.6% 0.029 79.4)
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 #3E4757, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.029
- Charcoal #264653 ΔE 0.034
- Charcoal Grey #3C4142 ΔE 0.036
- Dark Slate Gray #2F4F4F ΔE 0.038
- Onyx #343A40 ΔE 0.054
- Dark Teal #014D4E ΔE 0.061
- Dark Blue Grey #1F3B4D ΔE 0.062
- Deep Teal #00555A ΔE 0.062
Use #3E4757 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.