#33578B
Closest named color: Light Navy Blue (#2E5A88). oklch(45.5% 0.095 257.6), rgb(51, 87, 139).
Aa
White text reads best on this color (7.29:1).
About this color
#33578B is a medium-dark, moderately saturated blue. In OKLCH its lightness is 46%, its chroma 0.095 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy Blue (#2E5A88), ΔE 0.012 away. White text reads best on it, at 7.29:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.095) |
| Temperature | cool |
| Nearest name | Light Navy Blue (#2E5A88) |
| Black text | 2.87:1 |
| White text | 7.29:1 |
Values
| HEX | #33578B |
| RGB | rgb(51, 87, 139) |
| HSL | hsl(215, 46%, 37%) |
| OKLCH | oklch(45.5% 0.095 257.6) |
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 #33578B | 7.29:1 | AAA | Lc -90.1 | Preferred for body text |
| Black text on #33578B | 2.87:1 | Fails | Lc 18.9 | Dividers and decoration only |
| #33578B text on white | 7.29:1 | AAA | Lc 85.2 | Fine for body text |
| #33578B text on black | 2.87:1 | Fails | Lc -16.8 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E3EAF5
oklch(93.5% 0.017 259.4)
-
Step 200
200
#CDDAEE
oklch(88.5% 0.031 258.9)
-
Step 300
300
#ABC2E5
oklch(80.9% 0.056 258.7)
-
Step 400
400
#7DA2D8
oklch(70.6% 0.09 257.7)
-
Step 500
500
#5C8ACE
oklch(63% 0.115 258)
-
Step 600
600
#4273BA
oklch(55.5% 0.123 257.7)
-
Step 700
700
#3460A1
oklch(49% 0.116 258.1)
-
Step 800
800 (this color)
#33578B
oklch(45.5% 0.095 257.6)
-
Step 900
900
#274268
oklch(37.7% 0.073 257.1)
-
Step 950
950
#17273D
oklch(27% 0.047 256.6)
#33578B 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) | #415B8D | 0.022 |
| Deuteranopia (no green cones) | #35538A | 0.011 |
| Tritanopia (no blue cones) | #00636A | 0.080 |
| Achromatopsia (no color) | #565656 | 0.095 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #33578B
#33578B
oklch(45.5% 0.095 257.6)
- #744F00
#744F00
oklch(45.7% 0.095 77.7)
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 #33578B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy Blue #2E5A88 ΔE 0.012
- Denim Blue #3B5B92 ΔE 0.019
- Dusk Blue #26538D ΔE 0.019
- Dusk #4E5481 ΔE 0.036
- Twilight #4E518B ΔE 0.037
- Light Navy #155084 ΔE 0.037
- Dusky Blue #475F94 ΔE 0.037
- Denim #3B638C ΔE 0.038
Use #33578B 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.