#2491BD
Closest named color: Blue NCS (#118AB2). oklch(61.8% 0.114 230.8), rgb(36, 145, 189).
Aa
Black text reads best on this color (5.85:1).
About this color
#2491BD is a medium-dark, moderately saturated blue. In OKLCH its lightness is 62%, its chroma 0.114 and its hue 231°. Its hue sits on the cool side of the wheel. The nearest named color is Blue NCS (#118AB2), ΔE 0.026 away. Black text reads best on it, at 5.85:1.
| Hue family | Blues |
| Lightness | medium-dark (62%) |
| Chroma | moderately saturated (0.114) |
| Temperature | cool |
| Nearest name | Blue NCS (#118AB2) |
| Black text | 5.85:1 |
| White text | 3.58:1 |
Values
| HEX | #2491BD |
| RGB | rgb(36, 145, 189) |
| HSL | hsl(197, 68%, 44%) |
| OKLCH | oklch(61.8% 0.114 230.8) |
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 #2491BD | 3.58:1 | AA large text | Lc -68.5 | Content text, not long reading |
| Black text on #2491BD | 5.85:1 | AA | Lc 41.1 | Non-text elements, placeholder text |
| #2491BD text on white | 3.58:1 | AA large text | Lc 63.0 | Content text, not long reading |
| #2491BD text on black | 5.85:1 | AA | Lc -38.7 | 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
#E0ECF3
oklch(93.6% 0.016 233)
-
Step 200
200
#C5DDEA
oklch(88.4% 0.031 231.3)
-
Step 300
300
#9DC8DE
oklch(80.9% 0.055 230.5)
-
Step 400
400
#62ABCE
oklch(70.7% 0.089 230.6)
-
Step 500
500 (this color)
#2491BD
oklch(61.8% 0.114 230.8)
-
Step 600
600
#007EA8
oklch(55.6% 0.112 230.6)
-
Step 700
700
#006A8E
oklch(49.1% 0.099 230.6)
-
Step 800
800
#005775
oklch(42.8% 0.086 230.3)
-
Step 900
900
#034861
oklch(37.7% 0.074 230.3)
-
Step 950
950
#082A39
oklch(26.9% 0.047 231.5)
#2491BD 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) | #7B8FBF | 0.077 |
| Deuteranopia (no green cones) | #6681BC | 0.065 |
| Tritanopia (no blue cones) | #009DA0 | 0.066 |
| Achromatopsia (no color) | #878787 | 0.114 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2491BD
#2491BD
oklch(61.8% 0.114 230.8)
- #BB7041
#BB7041
oklch(61.8% 0.114 51.3)
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 #2491BD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue NCS #118AB2 ΔE 0.026
- Cool Blue #4984B8 ΔE 0.039
- Water Blue #0E87CC ΔE 0.042
- Steel Blue #4682B4 ΔE 0.043
- Off Blue #5684AE ΔE 0.047
- Dusty Blue #5A86AD ΔE 0.047
- Faded Blue #658CBB ΔE 0.051
- Teal Blue #01889F ΔE 0.051
Use #2491BD 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.