#2B91D1
Closest named color: Water Blue (#0E87CC). oklch(62.9% 0.132 241.7), rgb(43, 145, 209).
Aa
Black text reads best on this color (6.07:1).
About this color
#2B91D1 is a medium-light, moderately saturated blue. In OKLCH its lightness is 63%, its chroma 0.132 and its hue 242°. Its hue sits on the cool side of the wheel. The nearest named color is Water Blue (#0E87CC), ΔE 0.032 away. Black text reads best on it, at 6.07:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.132) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 6.07:1 |
| White text | 3.45:1 |
Values
| HEX | #2B91D1 |
| RGB | rgb(43, 145, 209) |
| HSL | hsl(203, 66%, 49%) |
| OKLCH | oklch(62.9% 0.132 241.7) |
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 #2B91D1 | 3.45:1 | AA large text | Lc -67.2 | Content text, not long reading |
| Black text on #2B91D1 | 6.07:1 | AA | Lc 42.4 | Non-text elements, placeholder text |
| #2B91D1 text on white | 3.45:1 | AA large text | Lc 61.7 | Content text, not long reading |
| #2B91D1 text on black | 6.07:1 | 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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#DFECF6
oklch(93.6% 0.019 240.7)
-
Step 200
200
#C5DDEF
oklch(88.5% 0.036 240.3)
-
Step 300
300
#9CC6E7
oklch(80.8% 0.065 242.2)
-
Step 400
400
#62A8DB
oklch(70.6% 0.103 241.8)
-
Step 500
500 (this color)
#2B91D1
oklch(62.9% 0.132 241.7)
-
Step 600
600
#007AB8
oklch(55.5% 0.131 241.7)
-
Step 700
700
#00679C
oklch(49.2% 0.116 241.5)
-
Step 800
800
#005481
oklch(42.7% 0.101 241.9)
-
Step 900
900
#05466B
oklch(37.7% 0.086 241.7)
-
Step 950
950
#08293F
oklch(27% 0.055 242.5)
#2B91D1 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) | #7392D4 | 0.064 |
| Deuteranopia (no green cones) | #5C83D0 | 0.050 |
| Tritanopia (no blue cones) | #00A1A8 | 0.089 |
| Achromatopsia (no color) | #8A8A8A | 0.132 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B91D1
#2B91D1
oklch(62.9% 0.132 241.7)
- #C17423
#C17423
oklch(63% 0.132 61.5)
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 #2B91D1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.032
- Dark Sky Blue #448EE4 ΔE 0.036
- Cool Blue #4984B8 ΔE 0.047
- Blue NCS #118AB2 ΔE 0.051
- Chefchaouen Blue #4895EF ΔE 0.051
- Faded Blue #658CBB ΔE 0.053
- Steel Blue #4682B4 ΔE 0.053
- Off Blue #5684AE ΔE 0.060
Use #2B91D1 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.