#33577D
Closest named color: Light Navy Blue (#2E5A88). oklch(44.7% 0.075 251), rgb(51, 87, 125).
Aa
White text reads best on this color (7.49:1).
About this color
#33577D is a dark, moderately saturated blue. In OKLCH its lightness is 45%, its chroma 0.075 and its hue 251°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy Blue (#2E5A88), ΔE 0.018 away. White text reads best on it, at 7.49:1.
| Hue family | Blues |
| Lightness | dark (45%) |
| Chroma | moderately saturated (0.075) |
| Temperature | cool |
| Nearest name | Light Navy Blue (#2E5A88) |
| Black text | 2.80:1 |
| White text | 7.49:1 |
Values
| HEX | #33577D |
| RGB | rgb(51, 87, 125) |
| HSL | hsl(211, 42%, 35%) |
| OKLCH | oklch(44.7% 0.075 251) |
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 #33577D | 7.49:1 | AAA | Lc -90.8 | Preferred for body text |
| Black text on #33577D | 2.80:1 | Fails | Lc 18.1 | Dividers and decoration only |
| #33577D text on white | 7.49:1 | AAA | Lc 85.9 | Fine for body text |
| #33577D text on black | 2.80:1 | Fails | Lc -16.1 | 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 800.
-
Step 50
50
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E4EBF2
oklch(93.7% 0.012 248)
-
Step 200
200
#CEDBE9
oklch(88.6% 0.024 250.1)
-
Step 300
300
#ACC3DD
oklch(80.8% 0.045 251.6)
-
Step 400
400
#80A4CC
oklch(70.7% 0.071 251.5)
-
Step 500
500
#5F8DBE
oklch(63% 0.09 250.9)
-
Step 600
600
#4577AB
oklch(55.7% 0.098 250.8)
-
Step 700
700
#366393
oklch(49% 0.092 251.6)
-
Step 800
800 (this color)
#33577D
oklch(44.7% 0.075 251)
-
Step 900
900
#294460
oklch(37.8% 0.058 250.4)
-
Step 950
950
#182838
oklch(27.1% 0.037 249.3)
#33577D 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) | #47597F | 0.026 |
| Deuteranopia (no green cones) | #3E517C | 0.020 |
| Tritanopia (no blue cones) | #006064 | 0.065 |
| Achromatopsia (no color) | #555555 | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #33577D
#33577D
oklch(44.7% 0.075 251)
- #6F4D20
#6F4D20
oklch(44.8% 0.076 71.2)
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 #33577D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy Blue #2E5A88 ΔE 0.018
- YInMn Blue #415A77 ΔE 0.023
- Dusk Blue #26538D ΔE 0.034
- Deep Sea Blue #015482 ΔE 0.036
- Dusk #4E5481 ΔE 0.036
- Denim Blue #3B5B92 ΔE 0.037
- Light Navy #155084 ΔE 0.038
- Denim #3B638C ΔE 0.042
Use #33577D 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.