#5181A2
Closest named color: Stormy Blue (#507B9C). oklch(58.2% 0.073 239.7), rgb(81, 129, 162).
Aa
Black text reads best on this color (5.01:1).
About this color
#5181A2 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 58%, its chroma 0.073 and its hue 240°. Its hue sits on the cool side of the wheel. The nearest named color is Stormy Blue (#507B9C), ΔE 0.018 away. Black text reads best on it, at 5.01:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.073) |
| Temperature | cool |
| Nearest name | Stormy Blue (#507B9C) |
| Black text | 5.01:1 |
| White text | 4.19:1 |
Values
| HEX | #5181A2 |
| RGB | rgb(81, 129, 162) |
| HSL | hsl(204, 33%, 48%) |
| OKLCH | oklch(58.2% 0.073 239.7) |
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 #5181A2 | 4.19:1 | AA large text | Lc -74.3 | Content text, not long reading |
| Black text on #5181A2 | 5.01:1 | AA | Lc 35.3 | Non-text elements, placeholder text |
| #5181A2 text on white | 4.19:1 | AA large text | Lc 68.8 | Content text, not long reading |
| #5181A2 text on black | 5.01:1 | AA | Lc -32.9 | Non-text elements, placeholder text |
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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E4EBF0
oklch(93.6% 0.01 238.5)
-
Step 200
200
#CFDBE4
oklch(88.5% 0.018 240)
-
Step 300
300
#AEC4D4
oklch(80.9% 0.033 239.5)
-
Step 400
400
#83A6BE
oklch(70.8% 0.052 238.4)
-
Step 500
500
#638FAE
oklch(63% 0.067 239.9)
-
Step 600
600 (this color)
#5181A2
oklch(58.2% 0.073 239.7)
-
Step 700
700
#3A6683
oklch(49.1% 0.068 239.1)
-
Step 800
800
#31536B
oklch(42.7% 0.056 240.6)
-
Step 900
900
#2B4557
oklch(37.7% 0.044 239.7)
-
Step 950
950
#1A2833
oklch(26.9% 0.028 242.7)
#5181A2 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) | #7281A4 | 0.041 |
| Deuteranopia (no green cones) | #6778A1 | 0.034 |
| Tritanopia (no blue cones) | #29898C | 0.058 |
| Achromatopsia (no color) | #7C7C7C | 0.073 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5181A2
#5181A2
oklch(58.2% 0.073 239.7)
- #9B714E
#9B714E
oklch(58.3% 0.073 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 #5181A2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Stormy Blue #507B9C ΔE 0.018
- Off Blue #5684AE ΔE 0.020
- Cerulean #457B9D ΔE 0.023
- Dusty Blue #5A86AD ΔE 0.023
- Steel Blue #4682B4 ΔE 0.028
- Cool Blue #4984B8 ΔE 0.033
- Grey Blue #647D8E ΔE 0.034
- Dull Blue #49759C ΔE 0.037
Use #5181A2 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.