#33427F
Closest named color: Cobalt (#1E488F). oklch(39.9% 0.104 270.7), rgb(51, 66, 127).
Aa
White text reads best on this color (9.43:1).
About this color
#33427F is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.104 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.034 away. White text reads best on it, at 9.43:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.104) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.22:1 |
| White text | 9.43:1 |
Values
| HEX | #33427F |
| RGB | rgb(51, 66, 127) |
| HSL | hsl(228, 43%, 35%) |
| OKLCH | oklch(39.9% 0.104 270.7) |
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 #33427F | 9.43:1 | AAA | Lc -95.9 | Preferred for body text |
| Black text on #33427F | 2.22:1 | Fails | Lc 12.3 | Not readable |
| #33427F text on white | 9.43:1 | AAA | Lc 91.6 | Preferred for body text |
| #33427F text on black | 2.22:1 | Fails | Lc -10.8 | 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
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E4E9FA
oklch(93.5% 0.024 272.8)
-
Step 200
200
#CED8F7
oklch(88.4% 0.044 271.3)
-
Step 300
300
#ADBFF4
oklch(81% 0.078 270)
-
Step 400
400
#839BEE
oklch(70.6% 0.125 270.7)
-
Step 500
500
#6680E9
oklch(63% 0.16 270.8)
-
Step 600
600
#4F67D7
oklch(55.6% 0.173 270.7)
-
Step 700
700
#4055BB
oklch(49.1% 0.162 270.6)
-
Step 800
800
#354697
oklch(42.7% 0.134 270.8)
-
Step 900
900 (this color)
#33427F
oklch(39.9% 0.104 270.7)
-
Step 950
950
#1B2346
oklch(26.9% 0.066 271.6)
#33427F 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) | #254A81 | 0.025 |
| Deuteranopia (no green cones) | #1B437E | 0.026 |
| Tritanopia (no blue cones) | #00505A | 0.093 |
| Achromatopsia (no color) | #464646 | 0.104 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #33427F
#33427F
oklch(39.9% 0.104 270.7)
- #584500
#584500
oklch(39.9% 0.082 90.8)
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 #33427F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.034
- Twilight Blue #0A437A ΔE 0.038
- Dark Slate Blue #483D8B ΔE 0.040
- Light Navy #155084 ΔE 0.044
- Blueberry #464196 ΔE 0.048
- Dusk Blue #26538D ΔE 0.050
- Deep Sea Blue #015482 ΔE 0.058
- Twilight #4E518B ΔE 0.063
Use #33427F 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.