#33639E
Closest named color: Dusky Blue (#475F94). oklch(49.5% 0.108 254.8), rgb(51, 99, 158).
Aa
White text reads best on this color (6.14:1).
About this color
#33639E is a medium-dark, moderately saturated blue. In OKLCH its lightness is 50%, its chroma 0.108 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Dusky Blue (#475F94), ΔE 0.025 away. White text reads best on it, at 6.14:1.
| Hue family | Blues |
| Lightness | medium-dark (50%) |
| Chroma | moderately saturated (0.108) |
| Temperature | cool |
| Nearest name | Dusky Blue (#475F94) |
| Black text | 3.41:1 |
| White text | 6.14:1 |
Values
| HEX | #33639E |
| RGB | rgb(51, 99, 158) |
| HSL | hsl(213, 51%, 41%) |
| OKLCH | oklch(49.5% 0.108 254.8) |
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 #33639E | 6.14:1 | AA | Lc -85.6 | Fine for body text |
| Black text on #33639E | 3.41:1 | AA large text | Lc 23.6 | Dividers and decoration only |
| #33639E text on white | 6.14:1 | AA | Lc 80.4 | Fine for body text |
| #33639E text on black | 3.41:1 | AA large text | Lc -21.4 | Dividers and decoration only |
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 700.
-
Step 50
50
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E3EBF4
oklch(93.7% 0.015 251.2)
-
Step 200
200
#CDDBED
oklch(88.6% 0.029 254.7)
-
Step 300
300
#AAC3E3
oklch(80.9% 0.053 254.7)
-
Step 400
400
#7DA3D4
oklch(70.6% 0.083 255.1)
-
Step 500
500
#5B8CC9
oklch(63.1% 0.107 254.6)
-
Step 600
600
#4075B6
oklch(55.6% 0.116 254.6)
-
Step 700
700 (this color)
#33639E
oklch(49.5% 0.108 254.8)
-
Step 800
800
#2A507F
oklch(42.7% 0.09 254.8)
-
Step 900
900
#264366
oklch(37.8% 0.07 254.1)
-
Step 950
950
#17273C
oklch(27% 0.045 255.6)
#33639E 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) | #4967A0 | 0.028 |
| Deuteranopia (no green cones) | #395D9D | 0.017 |
| Tritanopia (no blue cones) | #007179 | 0.087 |
| Achromatopsia (no color) | #626262 | 0.108 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #33639E
#33639E
oklch(49.5% 0.108 254.8)
- #845800
#845800
oklch(49.6% 0.104 75.3)
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 #33639E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusky Blue #475F94 ΔE 0.025
- Denim Blue #3B5B92 ΔE 0.027
- Denim #3B638C ΔE 0.030
- Peacock Blue #016795 ΔE 0.033
- Mid Blue #276AB3 ΔE 0.035
- French Blue #436BAD ΔE 0.037
- Light Navy Blue #2E5A88 ΔE 0.041
- Muted Blue #3B719F ΔE 0.043
Use #33639E 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.