#33517F
Closest named color: Dusk Blue (#26538D). oklch(43.4% 0.085 258.7), rgb(51, 81, 127).
Aa
White text reads best on this color (8.00:1).
About this color
#33517F is a dark, moderately saturated blue. In OKLCH its lightness is 43%, its chroma 0.085 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.025 away. White text reads best on it, at 8.00:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.085) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.62:1 |
| White text | 8.00:1 |
Values
| HEX | #33517F |
| RGB | rgb(51, 81, 127) |
| HSL | hsl(216, 43%, 35%) |
| OKLCH | oklch(43.4% 0.085 258.7) |
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 #33517F | 8.00:1 | AAA | Lc -92.3 | Preferred for body text |
| Black text on #33517F | 2.62:1 | Fails | Lc 16.4 | Dividers and decoration only |
| #33517F text on white | 8.00:1 | AAA | Lc 87.6 | Fine for body text |
| #33517F text on black | 2.62:1 | Fails | Lc -14.5 | 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 800.
-
Step 50
50
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E4EAF4
oklch(93.5% 0.015 260.7)
-
Step 200
200
#CEDAEC
oklch(88.5% 0.028 258.4)
-
Step 300
300
#AEC2E1
oklch(80.9% 0.049 259.1)
-
Step 400
400
#83A2D2
oklch(70.7% 0.079 259)
-
Step 500
500
#638AC6
oklch(63% 0.101 258.8)
-
Step 600
600
#4A73B3
oklch(55.5% 0.11 259)
-
Step 700
700
#3B619A
oklch(49.2% 0.102 258.3)
-
Step 800
800 (this color)
#33517F
oklch(43.4% 0.085 258.7)
-
Step 900
900
#2B4264
oklch(37.7% 0.065 258)
-
Step 950
950
#1A273B
oklch(27.1% 0.042 258.8)
#33517F 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) | #3E5481 | 0.017 |
| Deuteranopia (no green cones) | #344D7E | 0.012 |
| Tritanopia (no blue cones) | #005B62 | 0.073 |
| Achromatopsia (no color) | #505050 | 0.085 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #33517F
#33517F
oklch(43.4% 0.085 258.7)
- #6A4A0C
#6A4A0C
oklch(43.4% 0.085 78.1)
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 #33517F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.025
- Light Navy #155084 ΔE 0.027
- Light Navy Blue #2E5A88 ΔE 0.027
- Deep Sea Blue #015482 ΔE 0.032
- Dusk #4E5481 ΔE 0.038
- YInMn Blue #415A77 ΔE 0.039
- Denim Blue #3B5B92 ΔE 0.041
- Twilight #4E518B ΔE 0.042
Use #33517F 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.