#3D91CA
Closest named color: Water Blue (#0E87CC). oklch(63.1% 0.118 241.8), rgb(61, 145, 202).
Aa
Black text reads best on this color (6.10:1).
About this color
#3D91CA is a medium-light, moderately saturated blue. In OKLCH its lightness is 63%, its chroma 0.118 and its hue 242°. Its hue sits on the cool side of the wheel. The nearest named color is Water Blue (#0E87CC), ΔE 0.040 away. Black text reads best on it, at 6.10:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.118) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 6.10:1 |
| White text | 3.44:1 |
Values
| HEX | #3D91CA |
| RGB | rgb(61, 145, 202) |
| HSL | hsl(204, 57%, 52%) |
| OKLCH | oklch(63.1% 0.118 241.8) |
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 #3D91CA | 3.44:1 | AA large text | Lc -67.1 | Content text, not long reading |
| Black text on #3D91CA | 6.10:1 | AA | Lc 42.4 | Non-text elements, placeholder text |
| #3D91CA text on white | 3.44:1 | AA large text | Lc 61.7 | Content text, not long reading |
| #3D91CA text on black | 6.10:1 | AA | Lc -40.0 | 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
#E1ECF4
oklch(93.7% 0.016 239.1)
-
Step 200
200
#C7DCED
oklch(88.4% 0.033 242.4)
-
Step 300
300
#A0C6E3
oklch(80.9% 0.058 241.3)
-
Step 400
400
#6BA8D5
oklch(70.8% 0.092 241.7)
-
Step 500
500 (this color)
#3D91CA
oklch(63.1% 0.118 241.8)
-
Step 600
600
#0D7AB7
oklch(55.5% 0.128 242)
-
Step 700
700
#00679C
oklch(49.2% 0.116 241.5)
-
Step 800
800
#055480
oklch(42.7% 0.099 241.9)
-
Step 900
900
#134667
oklch(37.8% 0.077 241.9)
-
Step 950
950
#0D293C
oklch(27% 0.049 241.5)
#3D91CA 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) | #7792CD | 0.058 |
| Deuteranopia (no green cones) | #6484C9 | 0.047 |
| Tritanopia (no blue cones) | #009FA5 | 0.082 |
| Achromatopsia (no color) | #8A8A8A | 0.118 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3D91CA
#3D91CA
oklch(63.1% 0.118 241.8)
- #BC7735
#BC7735
oklch(63.1% 0.118 61.3)
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 #3D91CA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.040
- Cool Blue #4984B8 ΔE 0.040
- Faded Blue #658CBB ΔE 0.040
- Dark Sky Blue #448EE4 ΔE 0.043
- Steel Blue #4682B4 ΔE 0.047
- Blue NCS #118AB2 ΔE 0.048
- Dusty Blue #5A86AD ΔE 0.049
- Off Blue #5684AE ΔE 0.050
Use #3D91CA 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.