#34577B
Closest named color: YInMn Blue (#415A77). oklch(44.7% 0.072 250.4), rgb(52, 87, 123).
Aa
White text reads best on this color (7.51:1).
About this color
#34577B is a dark, moderately saturated blue. In OKLCH its lightness is 45%, its chroma 0.072 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.021 away. White text reads best on it, at 7.51:1.
| Hue family | Blues |
| Lightness | dark (45%) |
| Chroma | moderately saturated (0.072) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.79:1 |
| White text | 7.51:1 |
Values
| HEX | #34577B |
| RGB | rgb(52, 87, 123) |
| HSL | hsl(210, 41%, 34%) |
| OKLCH | oklch(44.7% 0.072 250.4) |
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 #34577B | 7.51:1 | AAA | Lc -90.8 | Preferred for body text |
| Black text on #34577B | 2.79:1 | Fails | Lc 18.0 | Dividers and decoration only |
| #34577B text on white | 7.51:1 | AAA | Lc 86.0 | Fine for body text |
| #34577B text on black | 2.79:1 | 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
#CEDBE8
oklch(88.6% 0.023 248.1)
-
Step 300
300
#ADC3DB
oklch(80.8% 0.042 250.6)
-
Step 400
400
#81A4CA
oklch(70.7% 0.068 250.9)
-
Step 500
500
#618DBC
oklch(63.1% 0.086 250.9)
-
Step 600
600
#4677A8
oklch(55.6% 0.093 249.8)
-
Step 700
700
#386490
oklch(49.2% 0.086 250)
-
Step 800
800 (this color)
#34577B
oklch(44.7% 0.072 250.4)
-
Step 900
900
#2A445E
oklch(37.8% 0.055 249.5)
-
Step 950
950
#192837
oklch(27.1% 0.035 249.2)
#34577B 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) | #48587D | 0.026 |
| Deuteranopia (no green cones) | #3F517A | 0.021 |
| Tritanopia (no blue cones) | #015F64 | 0.062 |
| Achromatopsia (no color) | #555555 | 0.072 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #34577B
#34577B
oklch(44.7% 0.072 250.4)
- #6E4D24
#6E4D24
oklch(44.7% 0.072 70)
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 #34577B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.021
- Light Navy Blue #2E5A88 ΔE 0.021
- Dusk #4E5481 ΔE 0.037
- Dusk Blue #26538D ΔE 0.037
- Deep Sea Blue #015482 ΔE 0.037
- Denim Blue #3B5B92 ΔE 0.039
- Light Navy #155084 ΔE 0.041
- Denim #3B638C ΔE 0.043
Use #34577B 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.