#34578F
Closest named color: Denim Blue (#3B5B92). oklch(45.8% 0.1 259.4), rgb(52, 87, 143).
Aa
White text reads best on this color (7.22:1).
About this color
#34578F is a medium-dark, moderately saturated blue. In OKLCH its lightness is 46%, its chroma 0.100 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Denim Blue (#3B5B92), ΔE 0.015 away. White text reads best on it, at 7.22:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.100) |
| Temperature | cool |
| Nearest name | Denim Blue (#3B5B92) |
| Black text | 2.90:1 |
| White text | 7.22:1 |
Values
| HEX | #34578F |
| RGB | rgb(52, 87, 143) |
| HSL | hsl(217, 47%, 38%) |
| OKLCH | oklch(45.8% 0.1 259.4) |
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 #34578F | 7.22:1 | AAA | Lc -89.8 | Fine for body text |
| Black text on #34578F | 2.90:1 | Fails | Lc 19.1 | Dividers and decoration only |
| #34578F text on white | 7.22:1 | AAA | Lc 84.9 | Fine for body text |
| #34578F text on black | 2.90:1 | Fails | Lc -17.1 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E3EAF6
oklch(93.5% 0.018 261.3)
-
Step 200
200
#CDDAEF
oklch(88.5% 0.032 260)
-
Step 300
300
#AAC2E7
oklch(80.9% 0.059 259)
-
Step 400
400
#7DA2DB
oklch(70.7% 0.093 258.8)
-
Step 500
500
#5C89D2
oklch(63% 0.121 259.7)
-
Step 600
600
#4272BF
oklch(55.6% 0.131 259.4)
-
Step 700
700
#345FA4
oklch(49% 0.121 259.4)
-
Step 800
800 (this color)
#34578F
oklch(45.8% 0.1 259.4)
-
Step 900
900
#27416B
oklch(37.6% 0.079 259.6)
-
Step 950
950
#17263E
oklch(26.8% 0.05 259.5)
#34578F 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) | #3F5C91 | 0.021 |
| Deuteranopia (no green cones) | #32538E | 0.012 |
| Tritanopia (no blue cones) | #00646C | 0.085 |
| Achromatopsia (no color) | #575757 | 0.100 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #34578F
#34578F
oklch(45.8% 0.1 259.4)
- #735000
#735000
oklch(45.7% 0.095 79.5)
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 #34578F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim Blue #3B5B92 ΔE 0.015
- Light Navy Blue #2E5A88 ΔE 0.017
- Dusk Blue #26538D ΔE 0.020
- Twilight #4E518B ΔE 0.035
- Dusky Blue #475F94 ΔE 0.035
- Dusk #4E5481 ΔE 0.038
- Denim #3B638C ΔE 0.039
- Light Navy #155084 ΔE 0.040
Use #34578F 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.