#2497CB
Closest named color: Water Blue (#0E87CC). oklch(63.9% 0.124 234), rgb(36, 151, 203).
Aa
Black text reads best on this color (6.36:1).
About this color
#2497CB is a medium-light, moderately saturated blue. In OKLCH its lightness is 64%, its chroma 0.124 and its hue 234°. Its hue sits on the cool side of the wheel. The nearest named color is Water Blue (#0E87CC), ΔE 0.048 away. Black text reads best on it, at 6.36:1.
| Hue family | Blues |
| Lightness | medium-light (64%) |
| Chroma | moderately saturated (0.124) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 6.36:1 |
| White text | 3.29:1 |
Values
| HEX | #2497CB |
| RGB | rgb(36, 151, 203) |
| HSL | hsl(199, 70%, 47%) |
| OKLCH | oklch(63.9% 0.124 234) |
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 #2497CB | 3.29:1 | AA large text | Lc -65.4 | Content text, not long reading |
| Black text on #2497CB | 6.36:1 | AA | Lc 44.1 | Non-text elements, placeholder text |
| #2497CB text on white | 3.29:1 | AA large text | Lc 59.9 | Large or bold text, headings |
| #2497CB text on black | 6.36:1 | AA | Lc -41.8 | 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
#F0F6FA
oklch(97% 0.008 236.6)
-
Step 100
100
#DFECF4
oklch(93.6% 0.018 234.5)
-
Step 200
200
#C4DDEC
oklch(88.4% 0.034 234.1)
-
Step 300
300
#9BC8E2
oklch(81% 0.06 233.8)
-
Step 400
400
#5EABD4
oklch(70.8% 0.097 233.7)
-
Step 500
500 (this color)
#2497CB
oklch(63.9% 0.124 234)
-
Step 600
600
#007DAD
oklch(55.6% 0.117 234.3)
-
Step 700
700
#006992
oklch(49.1% 0.103 234.3)
-
Step 800
800
#005678
oklch(42.7% 0.089 233.9)
-
Step 900
900
#004865
oklch(37.8% 0.079 233.7)
-
Step 950
950
#062A3B
oklch(26.9% 0.05 233.9)
#2497CB 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) | #7D96CD | 0.076 |
| Deuteranopia (no green cones) | #6787CA | 0.063 |
| Tritanopia (no blue cones) | #00A5A9 | 0.076 |
| Achromatopsia (no color) | #8D8D8D | 0.124 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2497CB
#2497CB
oklch(63.9% 0.124 234)
- #C5753C
#C5753C
oklch(63.9% 0.124 53.8)
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 #2497CB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.048
- Blue NCS #118AB2 ΔE 0.050
- Dark Sky Blue #448EE4 ΔE 0.053
- Faded Blue #658CBB ΔE 0.054
- Cool Blue #4984B8 ΔE 0.055
- Steel Blue #4682B4 ΔE 0.061
- Dusty Blue #5A86AD ΔE 0.062
- Chefchaouen Blue #4895EF ΔE 0.062
Use #2497CB 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.