#3A91C7
Closest named color: Cool Blue (#4984B8). oklch(62.8% 0.116 239.7), rgb(58, 145, 199).
Aa
Black text reads best on this color (6.05:1).
About this color
#3A91C7 is a medium-light, moderately saturated blue. In OKLCH its lightness is 63%, its chroma 0.116 and its hue 240°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Blue (#4984B8), ΔE 0.038 away. Black text reads best on it, at 6.05:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.116) |
| Temperature | cool |
| Nearest name | Cool Blue (#4984B8) |
| Black text | 6.05:1 |
| White text | 3.46:1 |
Values
| HEX | #3A91C7 |
| RGB | rgb(58, 145, 199) |
| HSL | hsl(203, 56%, 50%) |
| OKLCH | oklch(62.8% 0.116 239.7) |
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 #3A91C7 | 3.46:1 | AA large text | Lc -67.4 | Content text, not long reading |
| Black text on #3A91C7 | 6.05:1 | AA | Lc 42.1 | Non-text elements, placeholder text |
| #3A91C7 text on white | 3.46:1 | AA large text | Lc 61.9 | Content text, not long reading |
| #3A91C7 text on black | 6.05:1 | AA | Lc -39.8 | 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 500.
-
Step 50
50
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E0ECF4
oklch(93.6% 0.017 236.7)
-
Step 200
200
#C7DCEC
oklch(88.4% 0.032 240.7)
-
Step 300
300
#A0C6E2
oklch(80.8% 0.057 240.3)
-
Step 400
400
#6AA8D3
oklch(70.6% 0.09 240)
-
Step 500
500 (this color)
#3A91C7
oklch(62.8% 0.116 239.7)
-
Step 600
600
#047BB5
oklch(55.6% 0.126 240)
-
Step 700
700
#006799
oklch(49% 0.112 240)
-
Step 800
800
#01557E
oklch(42.8% 0.096 239.3)
-
Step 900
900
#114665
oklch(37.6% 0.075 239.6)
-
Step 950
950
#0D293B
oklch(26.9% 0.047 240.1)
#3A91C7 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) | #7891C9 | 0.061 |
| Deuteranopia (no green cones) | #6584C6 | 0.049 |
| Tritanopia (no blue cones) | #009FA4 | 0.079 |
| Achromatopsia (no color) | #8A8A8A | 0.116 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3A91C7
#3A91C7
oklch(62.8% 0.116 239.7)
- #BB7639
#BB7639
oklch(62.8% 0.115 59.6)
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 #3A91C7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Blue #4984B8 ΔE 0.038
- Water Blue #0E87CC ΔE 0.039
- Faded Blue #658CBB ΔE 0.040
- Blue NCS #118AB2 ΔE 0.043
- Steel Blue #4682B4 ΔE 0.045
- Dusty Blue #5A86AD ΔE 0.047
- Off Blue #5684AE ΔE 0.047
- Dark Sky Blue #448EE4 ΔE 0.048
Use #3A91C7 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.