#55709D
Closest named color: Dull Blue (#49759C). oklch(54.3% 0.078 260.3), rgb(85, 112, 157).
Aa
White text reads best on this color (5.01:1).
About this color
#55709D is a medium-dark, moderately saturated blue. In OKLCH its lightness is 54%, its chroma 0.078 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Dull Blue (#49759C), ΔE 0.019 away. White text reads best on it, at 5.01:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | moderately saturated (0.078) |
| Temperature | cool |
| Nearest name | Dull Blue (#49759C) |
| Black text | 4.19:1 |
| White text | 5.01:1 |
Values
| HEX | #55709D |
| RGB | rgb(85, 112, 157) |
| HSL | hsl(218, 30%, 47%) |
| OKLCH | oklch(54.3% 0.078 260.3) |
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 #55709D | 5.01:1 | AA | Lc -80.0 | Fine for body text |
| Black text on #55709D | 4.19:1 | AA large text | Lc 29.5 | Dividers and decoration only |
| #55709D text on white | 5.01:1 | AA | Lc 74.6 | Content text, not long reading |
| #55709D text on black | 4.19:1 | AA large text | Lc -27.1 | 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 600.
-
Step 50
50
#F4F5F9
oklch(97.1% 0.005 275)
-
Step 100
100
#E6EAF1
oklch(93.6% 0.01 261.8)
-
Step 200
200
#D2DAE6
oklch(88.6% 0.019 258.4)
-
Step 300
300
#B4C1D8
oklch(80.8% 0.036 261.9)
-
Step 400
400
#8DA2C4
oklch(70.8% 0.055 260)
-
Step 500
500
#708AB5
oklch(63% 0.072 260.3)
-
Step 600
600 (this color)
#55709D
oklch(54.3% 0.078 260.3)
-
Step 700
700
#49618A
oklch(49.1% 0.072 260.8)
-
Step 800
800
#3C4F70
oklch(42.6% 0.06 261.1)
-
Step 900
900
#33425B
oklch(37.7% 0.047 260.4)
-
Step 950
950
#1E2735
oklch(27.1% 0.029 259.1)
#55709D 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) | #5F739F | 0.017 |
| Deuteranopia (no green cones) | #576C9C | 0.011 |
| Tritanopia (no blue cones) | #397A80 | 0.070 |
| Achromatopsia (no color) | #6F6F6F | 0.078 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #55709D
#55709D
oklch(54.3% 0.078 260.3)
- #876A37
#876A37
oklch(54.2% 0.078 80)
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 #55709D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dull Blue #49759C ΔE 0.019
- Muted Blue #3B719F ΔE 0.028
- Metallic Blue #4F738E ΔE 0.029
- Flat Blue #3C73A8 ΔE 0.029
- Stormy Blue #507B9C ΔE 0.033
- Cerulean #457B9D ΔE 0.035
- French Blue #436BAD ΔE 0.038
- Dusky Blue #475F94 ΔE 0.054
Use #55709D 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.