#2591FD
Closest named color: Dodger Blue (#1E90FF). oklch(65.4% 0.185 253.1), rgb(37, 145, 253).
Aa
Black text reads best on this color (6.54:1).
About this color
#2591FD is a medium-light, vivid blue. In OKLCH its lightness is 65%, its chroma 0.185 and its hue 253°. Its hue sits on the cool side of the wheel. The nearest named color is Dodger Blue (#1E90FF), ΔE 0.005 away. Black text reads best on it, at 6.54:1.
| Hue family | Blues |
| Lightness | medium-light (65%) |
| Chroma | vivid (0.185) |
| Temperature | cool |
| Nearest name | Dodger Blue (#1E90FF) |
| Black text | 6.54:1 |
| White text | 3.20:1 |
Values
| HEX | #2591FD |
| RGB | rgb(37, 145, 253) |
| HSL | hsl(210, 98%, 57%) |
| OKLCH | oklch(65.4% 0.185 253.1) |
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 #2591FD | 3.20:1 | AA large text | Lc -64.1 | Content text, not long reading |
| Black text on #2591FD | 6.54:1 | AA | Lc 45.4 | Large or bold text, headings |
| #2591FD text on white | 3.20:1 | AA large text | Lc 58.7 | Large or bold text, headings |
| #2591FD text on black | 6.54:1 | AA | Lc -43.0 | 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
#F0F6FE
oklch(97.1% 0.012 255.5)
-
Step 100
100
#DEEBFC
oklch(93.5% 0.027 255.1)
-
Step 200
200
#C2DCFA
oklch(88.5% 0.05 252.1)
-
Step 300
300
#97C4FA
oklch(80.8% 0.091 253.4)
-
Step 400
400
#59A4F8
oklch(70.8% 0.145 252.8)
-
Step 500
500 (this color)
#2591FD
oklch(65.4% 0.185 253.1)
-
Step 600
600
#0073D4
oklch(55.6% 0.172 253.1)
-
Step 700
700
#0060B3
oklch(49% 0.152 253.2)
-
Step 800
800
#004F94
oklch(42.8% 0.131 252.8)
-
Step 900
900
#00417D
oklch(37.6% 0.117 253.3)
-
Step 950
950
#04274A
oklch(27.1% 0.076 252.4)
#2591FD 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) | #599AFF | 0.046 |
| Deuteranopia (no green cones) | #2D87FB | 0.025 |
| Tritanopia (no blue cones) | #00ABBB | 0.137 |
| Achromatopsia (no color) | #909090 | 0.185 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2591FD
#2591FD
oklch(65.4% 0.185 253.1)
- #C38100
#C38100
oklch(65.5% 0.139 73.3)
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 #2591FD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dodger Blue #1E90FF ΔE 0.005
- Chefchaouen Blue #4895EF ΔE 0.033
- Dark Sky Blue #448EE4 ΔE 0.039
- Soft Blue #6488EA ΔE 0.053
- Cornflower Blue #6495ED ΔE 0.054
- Clear Blue #247AFD ΔE 0.059
- Cornflower #6A79F7 ΔE 0.074
- Water Blue #0E87CC ΔE 0.077
Use #2591FD 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.