#364257
Closest named color: Dark Grey Blue (#29465B). oklch(37.7% 0.039 261.5), rgb(54, 66, 87).
Aa
White text reads best on this color (10.12:1).
About this color
#364257 is a dark, muted blue. In OKLCH its lightness is 38%, its chroma 0.039 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.019 away. White text reads best on it, at 10.12:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | muted (0.039) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.07:1 |
| White text | 10.12:1 |
Values
| HEX | #364257 |
| RGB | rgb(54, 66, 87) |
| HSL | hsl(218, 23%, 28%) |
| OKLCH | oklch(37.7% 0.039 261.5) |
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 #364257 | 10.12:1 | AAA | Lc -97.6 | Preferred for body text |
| Black text on #364257 | 2.07:1 | Fails | Lc 10.4 | Not readable |
| #364257 text on white | 10.12:1 | AAA | Lc 93.5 | Preferred for body text |
| #364257 text on black | 2.07:1 | Fails | Lc -9.0 | 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
#E7EAF0
oklch(93.6% 0.009 264.5)
-
Step 200
200
#D3D9E4
oklch(88.4% 0.016 262.7)
-
Step 300
300
#B6C1D4
oklch(80.8% 0.029 261.5)
-
Step 400
400
#90A1BF
oklch(70.6% 0.048 261.8)
-
Step 500
500
#758AAF
oklch(63.1% 0.061 261.6)
-
Step 600
600
#5E749A
oklch(55.7% 0.065 261.1)
-
Step 700
700
#4D6184
oklch(49.1% 0.062 261.3)
-
Step 800
800
#3F4F6B
oklch(42.6% 0.051 261.4)
-
Step 900
900 (this color)
#364257
oklch(37.7% 0.039 261.5)
-
Step 950
950
#202733
oklch(27.1% 0.025 261.1)
#364257 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) | #3B4358 | 0.009 |
| Deuteranopia (no green cones) | #374057 | 0.006 |
| Tritanopia (no blue cones) | #2C4649 | 0.035 |
| Achromatopsia (no color) | #424242 | 0.040 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #364257
#364257
oklch(37.7% 0.039 261.5)
- #4C4029
#4C4029
oklch(37.8% 0.04 83.1)
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 #364257, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.019
- Charcoal #264653 ΔE 0.026
- Charcoal Grey #3C4142 ΔE 0.036
- Onyx #343A40 ΔE 0.042
- Dark Blue Grey #1F3B4D ΔE 0.043
- Dark Slate Gray #2F4F4F ΔE 0.049
- Prussian Blue #1D3557 ΔE 0.057
- Midnight Green #073B4C ΔE 0.060
Use #364257 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.