#33455B
Closest named color: Dark Grey Blue (#29465B). oklch(38.5% 0.044 253.8), rgb(51, 69, 91).
Aa
White text reads best on this color (9.79:1).
About this color
#33455B is a dark, muted blue. In OKLCH its lightness is 38%, its chroma 0.044 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.013 away. White text reads best on it, at 9.79:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | muted (0.044) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.14:1 |
| White text | 9.79:1 |
Values
| HEX | #33455B |
| RGB | rgb(51, 69, 91) |
| HSL | hsl(213, 28%, 28%) |
| OKLCH | oklch(38.5% 0.044 253.8) |
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 #33455B | 9.79:1 | AAA | Lc -96.9 | Preferred for body text |
| Black text on #33455B | 2.14:1 | Fails | Lc 11.3 | Not readable |
| #33455B text on white | 9.79:1 | AAA | Lc 92.7 | Preferred for body text |
| #33455B text on black | 2.14:1 | Fails | Lc -9.8 | 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E6EAF0
oklch(93.6% 0.009 258.3)
-
Step 200
200
#D1DAE5
oklch(88.5% 0.018 253.4)
-
Step 300
300
#B2C2D6
oklch(80.8% 0.033 254)
-
Step 400
400
#8AA3C2
oklch(70.7% 0.054 254)
-
Step 500
500
#6D8CB2
oklch(63.1% 0.068 253.9)
-
Step 600
600
#55769E
oklch(55.7% 0.073 253.7)
-
Step 700
700
#456387
oklch(49.2% 0.068 253.6)
-
Step 800
800
#39516E
oklch(42.8% 0.057 253.7)
-
Step 900
900 (this color)
#33455B
oklch(38.5% 0.044 253.8)
-
Step 950
950
#1D2734
oklch(26.9% 0.028 255.2)
#33455B 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) | #3D465C | 0.015 |
| Deuteranopia (no green cones) | #38425B | 0.011 |
| Tritanopia (no blue cones) | #254A4C | 0.039 |
| Achromatopsia (no color) | #444444 | 0.044 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #33455B
#33455B
oklch(38.5% 0.044 253.8)
- #524028
#524028
oklch(38.4% 0.045 73.8)
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 #33455B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.013
- Charcoal #264653 ΔE 0.023
- Charcoal Grey #3C4142 ΔE 0.042
- Dark Slate Gray #2F4F4F ΔE 0.044
- Dark Blue Grey #1F3B4D ΔE 0.048
- Onyx #343A40 ΔE 0.050
- Dark Teal #014D4E ΔE 0.055
- Deep Teal #00555A ΔE 0.060
Use #33455B 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.