#33405B
Closest named color: Dark Grey Blue (#29465B). oklch(37.2% 0.05 264.3), rgb(51, 64, 91).
Aa
White text reads best on this color (10.36:1).
About this color
#33405B is a dark, muted blue. In OKLCH its lightness is 37%, its chroma 0.050 and its hue 264°. 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 10.36:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | muted (0.050) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.02:1 |
| White text | 10.36:1 |
Values
| HEX | #33405B |
| RGB | rgb(51, 64, 91) |
| HSL | hsl(221, 28%, 28%) |
| OKLCH | oklch(37.2% 0.05 264.3) |
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 #33405B | 10.36:1 | AAA | Lc -98.1 | Preferred for body text |
| Black text on #33405B | 2.02:1 | Fails | Lc 9.9 | Not readable |
| #33405B text on white | 10.36:1 | AAA | Lc 94.0 | Preferred for body text |
| #33405B text on black | 2.02:1 | Fails | Lc -8.5 | 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
#F4F5F9
oklch(97.1% 0.005 275)
-
Step 100
100
#E6EAF1
oklch(93.6% 0.01 261.8)
-
Step 200
200
#D2D9E7
oklch(88.4% 0.021 264.5)
-
Step 300
300
#B5C1DA
oklch(81% 0.038 265.1)
-
Step 400
400
#8EA1C7
oklch(70.8% 0.06 264.1)
-
Step 500
500
#7289B8
oklch(63% 0.076 264.2)
-
Step 600
600
#5B72A4
oklch(55.5% 0.083 264.9)
-
Step 700
700
#4A608D
oklch(49.1% 0.077 263.8)
-
Step 800
800
#3D4E72
oklch(42.6% 0.064 264.5)
-
Step 900
900 (this color)
#33405B
oklch(37.2% 0.05 264.3)
-
Step 950
950
#1F2636
oklch(26.9% 0.032 266.1)
#33405B 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) | #37425C | 0.009 |
| Deuteranopia (no green cones) | #323E5A | 0.007 |
| Tritanopia (no blue cones) | #254649 | 0.046 |
| Achromatopsia (no color) | #404040 | 0.050 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #33405B
#33405B
oklch(37.2% 0.05 264.3)
- #4D3E20
#4D3E20
oklch(37.2% 0.05 83.4)
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 #33405B, 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 0.031
- Dark Blue Grey #1F3B4D ΔE 0.040
- Charcoal Grey #3C4142 ΔE 0.046
- Onyx #343A40 ΔE 0.046
- Prussian Blue #1D3557 ΔE 0.049
- Midnight Green #073B4C ΔE 0.057
- Dark Slate Gray #2F4F4F ΔE 0.059
Use #33405B 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.