#33599D
Closest named color: Denim Blue (#3B5B92). oklch(47.1% 0.119 261.1), rgb(51, 89, 157).
Aa
White text reads best on this color (6.87:1).
About this color
#33599D is a medium-dark, moderately saturated blue. In OKLCH its lightness is 47%, its chroma 0.119 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Denim Blue (#3B5B92), ΔE 0.022 away. White text reads best on it, at 6.87:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | moderately saturated (0.119) |
| Temperature | cool |
| Nearest name | Denim Blue (#3B5B92) |
| Black text | 3.05:1 |
| White text | 6.87:1 |
Values
| HEX | #33599D |
| RGB | rgb(51, 89, 157) |
| HSL | hsl(218, 51%, 41%) |
| OKLCH | oklch(47.1% 0.119 261.1) |
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 #33599D | 6.87:1 | AA | Lc -88.5 | Fine for body text |
| Black text on #33599D | 3.05:1 | AA large text | Lc 20.6 | Dividers and decoration only |
| #33599D text on white | 6.87:1 | AA | Lc 83.5 | Fine for body text |
| #33599D text on black | 3.05:1 | AA large text | Lc -18.5 | 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
#F3F6FB
oklch(97.2% 0.007 260.7)
-
Step 100
100
#E4EAF5
oklch(93.6% 0.016 262.8)
-
Step 200
200
#CDDAEF
oklch(88.5% 0.032 260)
-
Step 300
300
#ACC2E6
oklch(81% 0.056 260.2)
-
Step 400
400
#80A1DA
oklch(70.6% 0.092 261.1)
-
Step 500
500
#6089D0
oklch(63.1% 0.117 260.8)
-
Step 600
600
#4771BD
oklch(55.5% 0.128 261.4)
-
Step 700
700 (this color)
#33599D
oklch(47.1% 0.119 261.1)
-
Step 800
800
#2F4E84
oklch(42.8% 0.097 260.8)
-
Step 900
900
#2A416A
oklch(37.7% 0.076 261.3)
-
Step 950
950
#19263E
oklch(27% 0.049 262)
#33599D 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) | #3960A0 | 0.022 |
| Deuteranopia (no green cones) | #28569C | 0.015 |
| Tritanopia (no blue cones) | #006973 | 0.098 |
| Achromatopsia (no color) | #5A5A5A | 0.119 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #33599D
#33599D
oklch(47.1% 0.119 261.1)
- #775400
#775400
oklch(47.1% 0.097 80.6)
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 #33599D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim Blue #3B5B92 ΔE 0.022
- Dusk Blue #26538D ΔE 0.034
- Dusky Blue #475F94 ΔE 0.035
- Light Navy Blue #2E5A88 ΔE 0.036
- Twilight #4E518B ΔE 0.044
- Denim #3B638C ΔE 0.046
- Peacock Blue #016795 ΔE 0.049
- Dusk #4E5481 ΔE 0.053
Use #33599D 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.