#033B79
Closest named color: Twilight Blue (#0A437A). oklch(35.9% 0.119 255.8), rgb(3, 59, 121).
Aa
White text reads best on this color (11.02:1).
About this color
#033B79 is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.119 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.025 away. White text reads best on it, at 11.02:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.119) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.90:1 |
| White text | 11.02:1 |
Values
| HEX | #033B79 |
| RGB | rgb(3, 59, 121) |
| HSL | hsl(212, 95%, 24%) |
| OKLCH | oklch(35.9% 0.119 255.8) |
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 #033B79 | 11.02:1 | AAA | Lc -98.8 | Preferred for body text |
| Black text on #033B79 | 1.90:1 | Fails | Lc 9.0 | Not readable |
| #033B79 text on white | 11.02:1 | AAA | Lc 94.9 | Preferred for body text |
| #033B79 text on black | 1.90:1 | Fails | Lc -7.7 | 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 900.
-
Step 50
50
#F0F6FE
oklch(97.1% 0.012 255.5)
-
Step 100
100
#DFEBFB
oklch(93.6% 0.025 255.6)
-
Step 200
200
#C4DBFA
oklch(88.4% 0.05 255.9)
-
Step 300
300
#9BC3FA
oklch(80.8% 0.089 256.5)
-
Step 400
400
#61A2F7
oklch(70.6% 0.142 255.8)
-
Step 500
500
#2F88F4
oklch(63.1% 0.182 255.8)
-
Step 600
600
#0070DE
oklch(55.7% 0.188 255.7)
-
Step 700
700
#005DBC
oklch(49% 0.167 256)
-
Step 800
800
#004C9C
oklch(42.7% 0.146 256)
-
Step 900
900 (this color)
#033B79
oklch(35.9% 0.119 255.8)
-
Step 950
950
#09264A
oklch(27% 0.075 255.8)
#033B79 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) | #14417B | 0.022 |
| Deuteranopia (no green cones) | #003778 | 0.012 |
| Tritanopia (no blue cones) | #004A54 | 0.088 |
| Achromatopsia (no color) | #3C3C3C | 0.119 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #033B79
#033B79
oklch(35.9% 0.119 255.8)
- #533600
#533600
oklch(35.8% 0.075 75.7)
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 #033B79, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.025
- Marine Blue #01386A ΔE 0.027
- Marine #042E60 ΔE 0.056
- Cobalt #1E488F ΔE 0.056
- Prussian Blue #1D3557 ΔE 0.060
- Light Navy #155084 ΔE 0.066
- Dark Grey Blue #29465B ΔE 0.074
- Deep Sea Blue #015482 ΔE 0.075
Use #033B79 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.