#607B9B
Closest named color: Stormy Blue (#507B9C). oklch(57.4% 0.059 253), rgb(96, 123, 155).
Aa
Black text reads best on this color (4.80:1).
About this color
#607B9B is a medium-dark, muted blue. In OKLCH its lightness is 57%, its chroma 0.059 and its hue 253°. Its hue sits on the cool side of the wheel. The nearest named color is Stormy Blue (#507B9C), ΔE 0.019 away. Black text reads best on it, at 4.80:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | muted (0.059) |
| Temperature | cool |
| Nearest name | Stormy Blue (#507B9C) |
| Black text | 4.80:1 |
| White text | 4.37:1 |
Values
| HEX | #607B9B |
| RGB | rgb(96, 123, 155) |
| HSL | hsl(213, 24%, 49%) |
| OKLCH | oklch(57.4% 0.059 253) |
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 #607B9B | 4.37:1 | AA large text | Lc -75.7 | Fine for body text |
| Black text on #607B9B | 4.80:1 | AA | Lc 33.8 | Non-text elements, placeholder text |
| #607B9B text on white | 4.37:1 | AA large text | Lc 70.3 | Content text, not long reading |
| #607B9B text on black | 4.80:1 | AA | Lc -31.4 | 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 600.
-
Step 50
50
#F4F6F8
oklch(97.2% 0.003 247.9)
-
Step 100
100
#E6EAEF
oklch(93.5% 0.008 253.9)
-
Step 200
200
#D2DAE3
oklch(88.5% 0.015 251.2)
-
Step 300
300
#B5C2D2
oklch(80.9% 0.027 253.6)
-
Step 400
400
#8EA3BB
oklch(70.7% 0.042 251.9)
-
Step 500
500
#738CAA
oklch(63.2% 0.054 253.2)
-
Step 600
600 (this color)
#607B9B
oklch(57.4% 0.059 253)
-
Step 700
700
#4A637F
oklch(49.1% 0.054 251.7)
-
Step 800
800
#3D5167
oklch(42.8% 0.044 251.3)
-
Step 900
900
#344354
oklch(37.7% 0.035 251.9)
-
Step 950
950
#1F2731
oklch(27% 0.022 254.2)
#607B9B 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) | #6F7C9D | 0.021 |
| Deuteranopia (no green cones) | #68769A | 0.016 |
| Tritanopia (no blue cones) | #4C8286 | 0.051 |
| Achromatopsia (no color) | #797979 | 0.059 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #607B9B
#607B9B
oklch(57.4% 0.059 253)
- #8E7351
#8E7351
oklch(57.3% 0.059 72.6)
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 #607B9B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Stormy Blue #507B9C ΔE 0.019
- Grey Blue #647D8E ΔE 0.023
- Cerulean #457B9D ΔE 0.030
- Slate Gray #708090 ΔE 0.033
- Off Blue #5684AE ΔE 0.034
- Dull Blue #49759C ΔE 0.034
- Dusty Blue #5A86AD ΔE 0.036
- Metallic Blue #4F738E ΔE 0.037
Use #607B9B 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.