#30739E
Closest named color: Muted Blue (#3B719F). oklch(53.2% 0.095 240.2), rgb(48, 115, 158).
Aa
White text reads best on this color (5.15:1).
About this color
#30739E is a medium-dark, moderately saturated blue. In OKLCH its lightness is 53%, its chroma 0.095 and its hue 240°. Its hue sits on the cool side of the wheel. The nearest named color is Muted Blue (#3B719F), ΔE 0.010 away. White text reads best on it, at 5.15:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.095) |
| Temperature | cool |
| Nearest name | Muted Blue (#3B719F) |
| Black text | 4.07:1 |
| White text | 5.15:1 |
Values
| HEX | #30739E |
| RGB | rgb(48, 115, 158) |
| HSL | hsl(203, 53%, 40%) |
| OKLCH | oklch(53.2% 0.095 240.2) |
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 #30739E | 5.15:1 | AA | Lc -80.7 | Fine for body text |
| Black text on #30739E | 4.07:1 | AA large text | Lc 28.8 | Dividers and decoration only |
| #30739E text on white | 5.15:1 | AA | Lc 75.3 | Fine for body text |
| #30739E text on black | 4.07:1 | AA large text | Lc -26.4 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E3EBF1
oklch(93.6% 0.012 239.9)
-
Step 200
200
#CCDCE8
oklch(88.6% 0.024 240.1)
-
Step 300
300
#A8C5DA
oklch(80.9% 0.043 239.6)
-
Step 400
400
#79A7C8
oklch(70.8% 0.069 240.2)
-
Step 500
500
#5590B9
oklch(63% 0.088 240.4)
-
Step 600
600 (this color)
#30739E
oklch(53.2% 0.095 240.2)
-
Step 700
700
#29678E
oklch(49.2% 0.089 239.8)
-
Step 800
800
#245473
oklch(42.7% 0.073 239.9)
-
Step 900
900
#23455D
oklch(37.6% 0.057 241.3)
-
Step 950
950
#152936
oklch(27% 0.036 238.5)
#30739E 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) | #5F73A0 | 0.050 |
| Deuteranopia (no green cones) | #50689D | 0.041 |
| Tritanopia (no blue cones) | #007E82 | 0.067 |
| Achromatopsia (no color) | #6D6D6D | 0.095 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #30739E
#30739E
oklch(53.2% 0.095 240.2)
- #945E2D
#945E2D
oklch(53.2% 0.095 60.5)
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 #30739E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Muted Blue #3B719F ΔE 0.010
- Flat Blue #3C73A8 ΔE 0.020
- Ocean Blue #03719C ΔE 0.022
- Dull Blue #49759C ΔE 0.025
- Sea Blue #047495 ΔE 0.026
- Nice Blue #107AB0 ΔE 0.031
- Cerulean #457B9D ΔE 0.033
- Metallic Blue #4F738E ΔE 0.037
Use #30739E 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.