#3D91CE
Closest named color: Dark Sky Blue (#448EE4). oklch(63.3% 0.122 243.6), rgb(61, 145, 206).
Aa
Black text reads best on this color (6.13:1).
About this color
#3D91CE is a medium-light, moderately saturated blue. In OKLCH its lightness is 63%, its chroma 0.122 and its hue 244°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.037 away. Black text reads best on it, at 6.13:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.122) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 6.13:1 |
| White text | 3.42:1 |
Values
| HEX | #3D91CE |
| RGB | rgb(61, 145, 206) |
| HSL | hsl(205, 60%, 52%) |
| OKLCH | oklch(63.3% 0.122 243.6) |
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 #3D91CE | 3.42:1 | AA large text | Lc -66.9 | Content text, not long reading |
| Black text on #3D91CE | 6.13:1 | AA | Lc 42.7 | Non-text elements, placeholder text |
| #3D91CE text on white | 3.42:1 | AA large text | Lc 61.4 | Content text, not long reading |
| #3D91CE text on black | 6.13:1 | AA | Lc -40.3 | 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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E1EBF5
oklch(93.5% 0.017 248)
-
Step 200
200
#C7DCEE
oklch(88.4% 0.034 244)
-
Step 300
300
#A0C6E5
oklch(81% 0.06 243.2)
-
Step 400
400
#6AA7D8
oklch(70.6% 0.096 244)
-
Step 500
500 (this color)
#3D91CE
oklch(63.3% 0.122 243.6)
-
Step 600
600
#0B7ABA
oklch(55.7% 0.132 243.1)
-
Step 700
700
#00669F
oklch(49.1% 0.12 243.6)
-
Step 800
800
#055382
oklch(42.6% 0.102 243.9)
-
Step 900
900
#134568
oklch(37.6% 0.079 243.8)
-
Step 950
950
#0D293D
oklch(27% 0.05 242.9)
#3D91CE 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) | #7592D1 | 0.056 |
| Deuteranopia (no green cones) | #6185CD | 0.043 |
| Tritanopia (no blue cones) | #00A0A6 | 0.088 |
| Achromatopsia (no color) | #8B8B8B | 0.122 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3D91CE
#3D91CE
oklch(63.3% 0.122 243.6)
- #BD782E
#BD782E
oklch(63.3% 0.122 63.7)
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 #3D91CE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.037
- Water Blue #0E87CC ΔE 0.039
- Faded Blue #658CBB ΔE 0.043
- Cool Blue #4984B8 ΔE 0.043
- Steel Blue #4682B4 ΔE 0.050
- Chefchaouen Blue #4895EF ΔE 0.051
- Blue NCS #118AB2 ΔE 0.052
- Off Blue #5684AE ΔE 0.054
Use #3D91CE 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.